Equations

Systems of Equations (Graphing)

A system of equations is simply a collection of equations that share a relationship. Here, you’ll learn how to solve two equations with two unknowns—two variables. You’ll learn three methods to solve systems of equations: Graphing, the substitution method, and the elimination method. Let’s start with graphing.

Graphing

Rule

Graphing

1.: Solve both equations for $y$ . This means that you should have $y$ by itself on one side of both expressions. It looks something like this: $y = a x + b$ .
2.: Your expressions are now linear functions. Draw both of them in the same coordinate system.
3.: Find the point of intersection and write down the corresponding values from the $x$ -axis and the $y$ -axis.

Example 1

Solve the system of equations

\begin{align} y - 2 x = 2 (1) 4 y + 4 x & = 20 & (2)First you solve (1) with respect to y : y = 2 x + 2 Then you solve (2) with respect to y : \begin{array}{l} 4 y + 4 x & = 20 \\ 4 y & = - 4 x + 20 | \div 4 \\ y & = - x + 5 \end{array} You may now plot the lines y = 2 x + 2 and y = - x + 5 : The point of intersection gives you x = 1 and y = 4 . ANSWER: (x, y) = (1, 4)Want to know more? Sign Up It's free!DoneContinue18Systems of Equations (Substitution)19Systems of Equations (Elimination)20Equations Activities 921Equations SolutionsHome Curriculum Games Stats LeagueAbout Us About House of Math Employees Career Media Lectures Blog Contact support@houseofmath.com Booking of private tutoring +47 22 150 300 Address Bygdøy allé 23
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            Norway FAQ Links WeTakeAction Math Magic for Ukraine Tutoring Bootcamps Junior Math Pen & Paper exercises Encyclopedia Book a Tutor Language/Curriculum Terms Privacy Download our app{"props":{"pageProps":{"campaign":false,"pageData":{"activities":[],"chest":{},"content":[],"encyclopediaArticle":{"path":"/drill/equations/systems-of-equations-graphing","locale":"en","metaDescription":"A system of equations is a collections of equations. We use three different methods to solve systems of equations that have different variables in them.","previewUrl":"https://images.houseofmath.com/eyJrZXkiOiJvdmVybGVhZi1hc3NldHMvcHJldmlldy8xN3N5c3RlbXNvZmVxdWF0aW9ucy5wbmciLCJidWNrZXQiOiJob20tZnJvbnRlbmQtYXNzZXRzIiwidmVyc2lvbiI6M30=","image":{"alt":"Two linear graphs intersecting at (1,4)","_key":"07340298-44eb-53d8-ab1b-adfdf07a7d98","type":"textwidth","dimension":"width","value":0.75,"url":"https://images.houseofmath.com/overleaf-assets/images/2likn2ukjente.svg"},"key":"content/en/drill/08 Equations/17SystemsOfEquations.tex","sharedLanguageKey":null,"title":"Systems of Equations (Graphing)","type":"drill","h1":"Systems of Equations (Graphing)","language":"en","htmlContent":{"html":"                                                                                                                                                                                                                                          \u003c/p\u003e\u003cp class=\"indent\" \u003e     A \u003cspan  class=\"ec-lmri-12x-x-144\"\u003esystem of equations \u003c/span\u003eis simply a collection of equations that share a relationship. Here, you’ll learn how to solve two equations with two unknowns—two variables. You’ll learn three methods to solve systems of equations: \u003cspan  class=\"ec-lmri-12x-x-144\"\u003eGraphing\u003c/span\u003e, the \u003ca href=\"/drill/equations/systems-of-equations-substitution\"\u003esubstitution method\u003c/a\u003e, and the \u003ca href=\"/drill/equations/systems-of-equations-elimination\"\u003eelimination method\u003c/a\u003e. Let’s start with graphing. \u003c/p\u003e\u003cp class=\"noindent\" \u003e \u003c/p\u003e \u003cp class=\"indent\" \u003e     \u003ch2 class=\"section-title\"\u003e \u003ca   id=\"x1-376000\"\u003e\u003c/a\u003eGraphing\u003c/h2\u003e \u003c/p\u003e      \u003cdiv class=\"tcolorbox foorule\" id=\"tcolobox-175\"\u003e     \u003cdiv class=\"tcolorbox-title\"\u003e                                                                                                                                                                                                                                          \u003cp class=\"indent\" \u003e     Rule\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\"tcolorbox-content\"\u003e\u003cp class=\"noindent\" \u003e\u003ch3 class=\"rule-container-title\"\u003e \u003cspan  class=\"ec-lmbx-12x-x-172\"\u003eGraphing\u003c/span\u003e \u003c/h3\u003e \u003c/p\u003e\u003cp class=\"noindent\" \u003e      \u003c/p\u003e\u003cdl class=\"enumerate-enumitem\"\u003e\u003cdt class=\"enumerate-enumitem\"\u003e    1.  \u003c/dt\u003e\u003cdd  class=\"enumerate-enumitem\"\u003e         Solve         both         equations         for         \u003cmath mathvariant=\"normal\"   xmlns=\"http://www.w3.org/1998/Math/MathML\"   display=\"inline\" \u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/math\u003e.         This         means         that         you         should         have         \u003cmath mathvariant=\"normal\"   xmlns=\"http://www.w3.org/1998/Math/MathML\"   display=\"inline\" \u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/math\u003e       by         itself         on         one         side         of         both         expressions.         It         looks         something         like         this:         \u003cmath mathvariant=\"normal\"   xmlns=\"http://www.w3.org/1998/Math/MathML\"   display=\"inline\" \u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\"MathClass-rel\"\u003e=\u003c/mo\u003e \u003cmi  \u003ea\u003c/mi\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\"MathClass-bin\"\u003e+\u003c/mo\u003e \u003cmi  \u003eb\u003c/mi\u003e\u003c/math type=\"punct\"\u003e.         \u003c/dd\u003e\u003cdt class=\"enumerate-enumitem\"\u003e     2.  \u003c/dt\u003e\u003cdd  class=\"enumerate-enumitem\"\u003e         Your         expressions         are         now         \u003ca href=\"/drill/functions/linear-functions\"\u003elinear         functions\u003c/a\u003e.         Draw         both         of         them         in         the         same         coordinate         system.         \u003c/dd\u003e\u003cdt class=\"enumerate-enumitem\"\u003e     3.  \u003c/dt\u003e\u003cdd  class=\"enumerate-enumitem\"\u003e         Find         the         point         of         intersection         and         write         down         the         corresponding         values         from         the         \u003cmath mathvariant=\"normal\"   xmlns=\"http://www.w3.org/1998/Math/MathML\"   display=\"inline\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e-axis         and         the         \u003cmath mathvariant=\"normal\"   xmlns=\"http://www.w3.org/1998/Math/MathML\"   display=\"inline\" \u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/math\u003e-axis.         \u003c/dd\u003e\u003c/dl\u003e                                                                                                                      \u003c/div\u003e  \u003c/div\u003e                                                                                                                           \u003cdiv class=\"tcolorbox fooqaexample\" id=\"tcolobox-176\"\u003e     \u003cdiv class=\"tcolorbox-title\"\u003e \u003cp class=\"indent\" \u003e     Example 1\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\"tcolorbox-content\"\u003e\u003cp class=\"noindent\" \u003e\u003cb\u003e\u003cspan  class=\"ec-lmbx-12x-x-144\"\u003eSolve the system of equations\u003c/span\u003e \u003c/p\u003e\u003cmath mathvariant=\"normal\"   xmlns=\"http://www.w3.org/1998/Math/MathML\"   display=\"block\" \u003e\u003cmtable  columnalign=\"left\" class=\"align\"\u003e                                       \u003cmtr\u003e\u003cmtd  columnalign=\"right\" class=\"align-odd\"\u003e\u003cmstyle mathvariant=\"bold-italic\"\u003e\u003cmstyle mathvariant=\"bold\"\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\"MathClass-bin\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003c/mtd\u003e                                 \u003cmtd  class=\"align-even\"\u003e\u003cmstyle mathvariant=\"bold-italic\"\u003e\u003cmstyle mathvariant=\"bold\"\u003e\u003cmo  class=\"MathClass-rel\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003cmspace width=\"2em\"/\u003e\u003c/mtd\u003e                                                                              \u003cmtd  columnalign=\"right\" class=\"align-label\"\u003e\u003cmstyle     id=\"x1-376006r1\"  class=\"label\" \u003e\u003c/mstyle\u003e\u003cmstyle  class=\"maketag\"\u003e\u003cmtext  \u003e(1)\u003c/mtext\u003e\u003c/mstyle\u003e\u003cmspace width=\"0.33em\" class=\"nbsp\" /\u003e                                                 \u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\"right\" class=\"align-odd\"\u003e\u003cmstyle mathvariant=\"bold-italic\"\u003e\u003cmstyle mathvariant=\"bold\"\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\"MathClass-bin\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003c/mtd\u003e                                \u003cmtd  class=\"align-even\"\u003e\u003cmstyle mathvariant=\"bold-italic\"\u003e\u003cmstyle mathvariant=\"bold\"\u003e\u003cmo  class=\"MathClass-rel\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003cmspace width=\"2em\"/\u003e\u003c/mtd\u003e                                                                            \u003cmtd  columnalign=\"right\" class=\"align-label\"\u003e\u003cmstyle     id=\"x1-376007r2\"  class=\"label\" \u003e\u003c/mstyle\u003e\u003cmstyle  class=\"maketag\"\u003e\u003cmtext  \u003e(2)\u003c/mtext\u003e\u003c/mstyle\u003e\u003cmspace width=\"0.33em\" class=\"nbsp\" /\u003e \u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e \u003cp class=\"noindent\" \u003e\u003c/b\u003e\u003c/p\u003e                                                                                                                     \u003cdiv class=\"lowerbox\"\u003e                                                                                                                                                                                                                                           \u003cp class=\"noindent\" \u003eFirst you solve (\u003ca  href=\"#\"\u003e1\u003c/a\u003e) with respect to \u003cmath mathvariant=\"normal\"   xmlns=\"http://www.w3.org/1998/Math/MathML\"   display=\"inline\" \u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/math type=\"divide\"\u003e: \u003c/p\u003e\u003ctable class=\"equation-star\"\u003e\u003ctr\u003e\u003ctd\u003e \u003cmath mathvariant=\"normal\"   xmlns=\"http://www.w3.org/1998/Math/MathML\"   display=\"block\" class=\"equation\"\u003e                                                   \u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\"MathClass-rel\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\"MathClass-bin\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003c/math\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/table\u003e \u003cp class=\"noindent\" \u003eThen you solve (\u003ca  href=\"#\"\u003e2\u003c/a\u003e) with respect to \u003cmath mathvariant=\"normal\"   xmlns=\"http://www.w3.org/1998/Math/MathML\"   display=\"inline\" \u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/math type=\"divide\"\u003e: \u003c/p\u003e\u003cmath mathvariant=\"normal\"   xmlns=\"http://www.w3.org/1998/Math/MathML\"   display=\"block\" \u003e\u003cmtable  columnalign=\"left\" class=\"align-star\"\u003e                                        \u003cmtr\u003e\u003cmtd  columnalign=\"right\" class=\"align-odd\"\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\"MathClass-bin\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                       \u003cmtd  class=\"align-even\"\u003e \u003cmo  class=\"MathClass-rel\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmspace width=\"2em\"/\u003e\u003c/mtd\u003e                                                       \u003cmtd  columnalign=\"right\" class=\"align-label\"\u003e\u003c/mtd\u003e                                       \u003cmtd  class=\"align-label\"\u003e                                        \u003cmspace width=\"2em\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\"right\" class=\"align-odd\"\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e                                              \u003cmtd  class=\"align-even\"\u003e \u003cmo  class=\"MathClass-rel\"\u003e=\u003c/mo\u003e \u003cmo  class=\"MathClass-bin\"\u003e−\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\"MathClass-bin\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmspace width=\"1em\" class=\"quad\"/\u003e\u003cmo  class=\"MathClass-rel\"\u003e|\u003c/mo\u003e\u003cmo  class=\"MathClass-bin\"\u003e÷\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmspace width=\"2em\"/\u003e\u003c/mtd\u003e                                       \u003cmtd  columnalign=\"right\" class=\"align-label\"\u003e\u003c/mtd\u003e                                       \u003cmtd  class=\"align-label\"\u003e                                        \u003cmspace width=\"2em\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\"right\" class=\"align-odd\"\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e                                                \u003cmtd  class=\"align-even\"\u003e \u003cmo  class=\"MathClass-rel\"\u003e=\u003c/mo\u003e \u003cmo  class=\"MathClass-bin\"\u003e−\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\"MathClass-bin\"\u003e+\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmspace width=\"2em\"/\u003e\u003c/mtd\u003e                                                \u003cmtd  columnalign=\"right\" class=\"align-label\"\u003e\u003c/mtd\u003e                                       \u003cmtd  class=\"align-label\"\u003e \u003cmspace width=\"2em\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e \u003cp class=\"noindent\" \u003eYou may now plot the lines \u003cmath mathvariant=\"normal\"   xmlns=\"http://www.w3.org/1998/Math/MathML\"   display=\"inline\" \u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\"MathClass-rel\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\"MathClass-bin\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e and \u003cmath mathvariant=\"normal\"   xmlns=\"http://www.w3.org/1998/Math/MathML\"   display=\"inline\" \u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\"MathClass-rel\"\u003e=\u003c/mo\u003e \u003cmo  class=\"MathClass-bin\"\u003e−\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\"MathClass-bin\"\u003e+\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003c/math type=\"divide\"\u003e: \u003c/p\u003e \u003cdiv class=\"center\"  \u003e \u003cp class=\"noindent\" \u003e \u003c/p\u003e\u003cp class=\"noindent\" \u003e\u003cimg src=\"https://images.houseofmath.com/overleaf-assets/images/2likn2ukjente.svg\" alt=\"Two linear graphs intersecting at (1,4)\" width=\"451\" height=\"451\"\u003e\u003c/p\u003e\u003c/div\u003e \u003cp class=\"noindent\" \u003eThe point of intersection gives you \u003cmath mathvariant=\"normal\"   xmlns=\"http://www.w3.org/1998/Math/MathML\"   display=\"inline\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\"MathClass-rel\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e and \u003cmath mathvariant=\"normal\"   xmlns=\"http://www.w3.org/1998/Math/MathML\"   display=\"inline\" \u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\"MathClass-rel\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math type=\"punct\"\u003e. \u003c/p\u003e\u003cp class=\"noindent\" \u003eANSWER: \u003cmath mathvariant=\"normal\"   xmlns=\"http://www.w3.org/1998/Math/MathML\"   display=\"inline\" \u003e\u003cmo  class=\"MathClass-open\" stretchy=\"false\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\"MathClass-punc\"\u003e,\u003c/mo\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003cmo  class=\"MathClass-close\" stretchy=\"false\"\u003e)\u003c/mo\u003e \u003cmo  class=\"MathClass-rel\"\u003e=\u003c/mo\u003e \u003cmo  class=\"MathClass-open\" stretchy=\"false\"\u003e(\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\"MathClass-punc\"\u003e,\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmo  class=\"MathClass-close\" stretchy=\"false\"\u003e)\u003c/mo\u003e\u003c/math\u003e \u003c/p\u003e                                                                                                                     \u003c/div\u003e  \u003c/div\u003e  \u003c/div\u003e                                                                                                                      \u003cp class=\"indent\" \u003e     "},"isRootPath":false,"breadcrumbs":[{"_key":"09bac112-9008-5368-8dda-35028d5916a1","path":"/drill","h1":"Pen \u0026 paper exercises"},{"path":"/drill/equations","h1":"Equations","_key":"0ef35d09-f051-59f2-a098-f18928219db1"},{"h1":"Systems of Equations (Graphing)","_key":"d14c8983-069d-56b0-95f8-d11fd5794164","path":"/drill/equations/systems-of-equations-graphing"}],"taskReference":null,"cssUrl":"/3e26151e-8cd9-466a-907f-43e1e928c4e8-en-0.css","siblings":[{"h1":"What Is an 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Here, you’ll learn how to solve two equations with two unknowns—two variables. You’ll learn three methods to solve systems of equations: \u003cspan  class=\\\"ec-lmri-12x-x-144\\\"\u003eGraphing\u003c/span\u003e, the \u003ca href=\\\"/drill/equations/systems-of-equations-substitution\\\"\u003esubstitution method\u003c/a\u003e, and the \u003ca href=\\\"/drill/equations/systems-of-equations-elimination\\\"\u003eelimination method\u003c/a\u003e. Let’s start with graphing. \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch2 class=\\\"section-title\\\"\u003e \u003ca   id=\\\"x1-376000\\\"\u003e\u003c/a\u003eGraphing\u003c/h2\u003e \u003c/p\u003e      \u003cdiv class=\\\"tcolorbox foorule\\\" id=\\\"tcolobox-175\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     Rule\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e\u003ch3 class=\\\"rule-container-title\\\"\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eGraphing\u003c/span\u003e \u003c/h3\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e      \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e    1.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Solve         both         equations         for         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/math\u003e.         This         means         that         you         should         have         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/math\u003e       by         itself         on         one         side         of         both         expressions.         It         looks         something         like         this:         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmi  \u003ea\u003c/mi\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003eb\u003c/mi\u003e\u003c/math type=\\\"punct\\\"\u003e.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     2.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Your         expressions         are         now         \u003ca href=\\\"/drill/functions/linear-functions\\\"\u003elinear         functions\u003c/a\u003e.         Draw         both         of         them         in         the         same         coordinate         system.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     3.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Find         the         point         of         intersection         and         write         down         the         corresponding         values         from         the         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e-axis         and         the         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/math\u003e-axis.         \u003c/dd\u003e\u003c/dl\u003e                                                                                                                      \u003c/div\u003e  \u003c/div\u003e                                                                                                                           \u003cdiv class=\\\"tcolorbox fooqaexample\\\" id=\\\"tcolobox-176\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e \u003cp class=\\\"indent\\\" \u003e     Example 1\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e\u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eSolve the system of equations\u003c/span\u003e \u003c/p\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align\\\"\u003e                                       \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003c/mtd\u003e                                 \u003cmtd  class=\\\"align-even\\\"\u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                                              \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003cmstyle     id=\\\"x1-376006r1\\\"  class=\\\"label\\\" \u003e\u003c/mstyle\u003e\u003cmstyle  class=\\\"maketag\\\"\u003e\u003cmtext  \u003e(1)\u003c/mtext\u003e\u003c/mstyle\u003e\u003cmspace width=\\\"0.33em\\\" class=\\\"nbsp\\\" /\u003e                                                 \u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003c/mtd\u003e                                \u003cmtd  class=\\\"align-even\\\"\u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                                            \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003cmstyle     id=\\\"x1-376007r2\\\"  class=\\\"label\\\" \u003e\u003c/mstyle\u003e\u003cmstyle  class=\\\"maketag\\\"\u003e\u003cmtext  \u003e(2)\u003c/mtext\u003e\u003c/mstyle\u003e\u003cmspace width=\\\"0.33em\\\" class=\\\"nbsp\\\" /\u003e \u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/b\u003e\u003c/p\u003e                                                                                                                     \u003cdiv class=\\\"lowerbox\\\"\u003e                                                                                                                                                                                                                                           \u003cp class=\\\"noindent\\\" \u003eFirst you solve (\u003ca  href=\\\"#\\\"\u003e1\u003c/a\u003e) with respect to \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/math type=\\\"divide\\\"\u003e: \u003c/p\u003e\u003ctable class=\\\"equation-star\\\"\u003e\u003ctr\u003e\u003ctd\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" class=\\\"equation\\\"\u003e                                                   \u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003c/math\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/table\u003e \u003cp class=\\\"noindent\\\" \u003eThen you solve (\u003ca  href=\\\"#\\\"\u003e2\u003c/a\u003e) with respect to \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/math type=\\\"divide\\\"\u003e: \u003c/p\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                        \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                       \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                       \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                       \u003cmtd  class=\\\"align-label\\\"\u003e                                        \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e                                              \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmspace width=\\\"1em\\\" class=\\\"quad\\\"/\u003e\u003cmo  class=\\\"MathClass-rel\\\"\u003e|\u003c/mo\u003e\u003cmo  class=\\\"MathClass-bin\\\"\u003e÷\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                       \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                       \u003cmtd  class=\\\"align-label\\\"\u003e                                        \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e                                                \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                       \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e \u003cp class=\\\"noindent\\\" \u003eYou may now plot the lines \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e and \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003c/math type=\\\"divide\\\"\u003e: \u003c/p\u003e \u003cdiv class=\\\"center\\\"  \u003e \u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e\u003cimg src=\\\"https://images.houseofmath.com/overleaf-assets/images/2likn2ukjente.svg\\\" alt=\\\"Two linear graphs intersecting at (1,4)\\\" width=\\\"451\\\" height=\\\"451\\\"\u003e\u003c/p\u003e\u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003eThe point of intersection gives you \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e and \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math type=\\\"punct\\\"\u003e. \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003eANSWER: \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e \u003c/p\u003e                                                                                                                     \u003c/div\u003e  \u003c/div\u003e  \u003c/div\u003e                                                                                                                      \u003cp class=\\\"indent\\\" \u003e     \"},\"isRootPath\":false,\"breadcrumbs\":[{\"_key\":\"09bac112-9008-5368-8dda-35028d5916a1\",\"path\":\"/drill\",\"h1\":\"Pen \u0026 paper exercises\"},{\"path\":\"/drill/equations\",\"h1\":\"Equations\",\"_key\":\"0ef35d09-f051-59f2-a098-f18928219db1\"},{\"h1\":\"Systems of Equations (Graphing)\",\"_key\":\"d14c8983-069d-56b0-95f8-d11fd5794164\",\"path\":\"/drill/equations/systems-of-equations-graphing\"}],\"taskReference\":null,\"cssUrl\":\"/3e26151e-8cd9-466a-907f-43e1e928c4e8-en-0.css\",\"siblings\":[{\"h1\":\"What Is an Equation?\",\"path\":\"/drill/equations/what-is-an-equation\"},{\"h1\":\"Activities 1\",\"path\":\"/drill/equations/equations-activities-1\"},{\"h1\":\"Remove Number in Front of x\",\"path\":\"/drill/equations/remove-number-in-front-of-x\"},{\"h1\":\"Activities 2\",\"path\":\"/drill/equations/equations-activities-2\"},{\"h1\":\"Remove Number Under x\",\"path\":\"/drill/equations/remove-number-under-x\"},{\"h1\":\"Activities 3\",\"path\":\"/drill/equations/equations-activities-3\"},{\"h1\":\"Equations with Several Terms on Both Sides\",\"path\":\"/drill/equations/equations-with-several-terms-on-both-sides\"},{\"h1\":\"Activities 4\",\"path\":\"/drill/equations/equations-activities-4\"},{\"h1\":\"Equations with Fractions and Parentheses\",\"path\":\"/drill/equations/equations-with-fractions-and-parentheses\"},{\"h1\":\"Activities 5\",\"path\":\"/drill/equations/equations-activities-5\"},{\"h1\":\"Equations with x in the Denominator\",\"path\":\"/drill/equations/equations-with-x-in-the-denominator\"},{\"h1\":\"Activities 6\",\"path\":\"/drill/equations/equations-activities-6\"},{\"h1\":\"Checking the Answer\",\"path\":\"/drill/equations/checking-the-answer\"},{\"h1\":\"Activities 7\",\"path\":\"/drill/equations/equations-activities-7\"},{\"h1\":\"How to Solve Power Equations\",\"path\":\"/drill/equations/how-to-solve-power-equations\"},{\"h1\":\"Activities 8\",\"path\":\"/drill/equations/equations-activities-8\"},{\"h1\":\"Systems of Equations (Graphing)\",\"path\":\"/drill/equations/systems-of-equations-graphing\"},{\"h1\":\"Systems of Equations (Substitution)\",\"path\":\"/drill/equations/systems-of-equations-substitution\"},{\"h1\":\"Systems of Equations (Elimination)\",\"path\":\"/drill/equations/systems-of-equations-elimination\"},{\"h1\":\"Activities 9\",\"path\":\"/drill/equations/equations-activities-9\"},{\"h1\":\"Solutions\",\"path\":\"/drill/equations/equations-solutions\"}]}},\"bootcampVideo\":{\"progressPercentage\":0,\"videoLength\":1},\"vcc\":{\"module\":{\"assets\":null,\"firstPageData\":{\"level\":\"1\",\"regular\":false,\"shortTitle\":null,\"hasEncyclopedia\":true},\"page\":[{\"assets\":null,\"name\":\"What Is an Equation?\",\"howContent\":null,\"encyclopediaArticle\":{\"sharedLanguageKey\":null,\"previewUrl\":\"https://images.houseofmath.com/eyJrZXkiOiJvdmVybGVhZi1hc3NldHMvcHJldmlldy8wMW1vdmVzd2l0Y2gucG5nIiwiYnVja2V0IjoiaG9tLWZyb250ZW5kLWFzc2V0cyIsInZlcnNpb24iOjN9\",\"siblings\":[{\"h1\":\"What Is an Equation?\",\"path\":\"/drill/equations/what-is-an-equation\"},{\"h1\":\"Activities 1\",\"path\":\"/drill/equations/equations-activities-1\"},{\"h1\":\"Remove Number in Front of x\",\"path\":\"/drill/equations/remove-number-in-front-of-x\"},{\"h1\":\"Activities 2\",\"path\":\"/drill/equations/equations-activities-2\"},{\"h1\":\"Remove Number Under x\",\"path\":\"/drill/equations/remove-number-under-x\"},{\"h1\":\"Activities 3\",\"path\":\"/drill/equations/equations-activities-3\"},{\"h1\":\"Equations with Several Terms on Both Sides\",\"path\":\"/drill/equations/equations-with-several-terms-on-both-sides\"},{\"h1\":\"Activities 4\",\"path\":\"/drill/equations/equations-activities-4\"},{\"h1\":\"Equations with Fractions and Parentheses\",\"path\":\"/drill/equations/equations-with-fractions-and-parentheses\"},{\"h1\":\"Activities 5\",\"path\":\"/drill/equations/equations-activities-5\"},{\"h1\":\"Equations with x in the Denominator\",\"path\":\"/drill/equations/equations-with-x-in-the-denominator\"},{\"h1\":\"Activities 6\",\"path\":\"/drill/equations/equations-activities-6\"},{\"h1\":\"Checking the Answer\",\"path\":\"/drill/equations/checking-the-answer\"},{\"h1\":\"Activities 7\",\"path\":\"/drill/equations/equations-activities-7\"},{\"h1\":\"How to Solve Power Equations\",\"path\":\"/drill/equations/how-to-solve-power-equations\"},{\"h1\":\"Activities 8\",\"path\":\"/drill/equations/equations-activities-8\"},{\"h1\":\"Systems of Equations (Graphing)\",\"path\":\"/drill/equations/systems-of-equations-graphing\"},{\"h1\":\"Systems of Equations (Substitution)\",\"path\":\"/drill/equations/systems-of-equations-substitution\"},{\"h1\":\"Systems of Equations (Elimination)\",\"path\":\"/drill/equations/systems-of-equations-elimination\"},{\"h1\":\"Activities 9\",\"path\":\"/drill/equations/equations-activities-9\"},{\"h1\":\"Solutions\",\"path\":\"/drill/equations/equations-solutions\"}],\"type\":\"drill\",\"h1\":\"What Is an Equation?\",\"htmlContent\":{\"html\":\" \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     An \u003cspan  class=\\\"ec-lmri-12x-x-144\\\"\u003eequation \u003c/span\u003eis a mathematical expression with a left-hand side and a right-hand side, separated by an equals sign (\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003c/math\u003e) in the middle. The equals sign indicates that the left-hand side is the same as the right-hand side. You can use an equation is to find the value of a variable. To do this, you have to tidy up                                                                                                                                                                                                                                          each side of the equation, such that the variable ends up alone on one side, with the numbers (known as constants) on the other side. \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     Here, you’ll learn the techniques needed to tidy up and solve different equations. \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch2 class=\\\"section-title\\\"\u003e \u003ca   id=\\\"x1-355000\\\"\u003e\u003c/a\u003eChange Side, Change Sign\u003c/h2\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     You might have learned that equations have to be \u003cspan  class=\\\"ec-lmri-12x-x-144\\\"\u003ebalanced. \u003c/span\u003eThis means that when you do something on one side of the equal sign, you have to do the same thing on the other side, to keep the balance. Let’s look at some examples. \u003c/p\u003e                                                                                                                                                                                                                                               \u003cdiv class=\\\"tcolorbox fooexample\\\" id=\\\"tcolobox-158\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     Example 1\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                               \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmstyle mathcolor=\\\"#E60000\\\"\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mstyle\u003e\u003c/mtd\u003e                                                   \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                   \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                              \u003cmtd  class=\\\"align-label\\\"\u003e                                               \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mtd\u003e                                              \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                              \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                              \u003cmtd  class=\\\"align-label\\\"\u003e                                               \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                            \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmstyle mathcolor=\\\"#E60000\\\"\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mstyle\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                              \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                              \u003cmtd  class=\\\"align-label\\\"\u003e                                               \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                            \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                   \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                              \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e With this equation, you want to get rid of the 3 on the left-hand side, so that the variable \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e can be left on its own. If you subtract \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e on the left-hand side, the constant term \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e disappears. The \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e you removed from the left-hand side must also be subtracted from the right-hand side to keep the equation in balance. Then, the \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e appears on the other side of the equal sign, but with the opposite sign.                       \u003c/div\u003e  \u003c/div\u003e                                                                                                                           \u003cdiv class=\\\"tcolorbox fooexample\\\" id=\\\"tcolobox-159\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     Example 2\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                               \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmstyle mathcolor=\\\"#E60000\\\"\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mstyle\u003e\u003c/mtd\u003e                                                   \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                   \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                              \u003cmtd  class=\\\"align-label\\\"\u003e                                               \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mtd\u003e                                              \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                              \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                              \u003cmtd  class=\\\"align-label\\\"\u003e                                               \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                            \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmstyle mathcolor=\\\"#E60000\\\"\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mstyle\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                              \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                              \u003cmtd  class=\\\"align-label\\\"\u003e                                               \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                            \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                   \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                              \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e With this equation, you need to get rid of the \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e on the left-hand side so that the variable \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e can be left on its own. If you add \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e on the left-hand side, the constant term \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e will get cancelled out. Then, you also add \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e to the right-hand side, to keep the equation in balance.                                            \u003c/div\u003e  \u003c/div\u003e                                                                                                                           \u003cdiv class=\\\"tcolorbox foorule\\\" id=\\\"tcolobox-160\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     Rule\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e\u003ch3 class=\\\"rule-container-title\\\"\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eChange\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eSide,\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eChange\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eSign\u003c/span\u003e \u003c/h3\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003eWhen adding or subtracting a term on both sides, you can look at it like you’re moving the term over to the other side and changing its sign. So I call this the “change side, change sign” rule. \u003c/p\u003e                                                                                                                     \u003c/div\u003e  \u003c/div\u003e                                                                                                                      \u003cp class=\\\"indent\\\" \u003e     \"},\"taskReference\":null,\"metaDescription\":\"An equation is a mathematical expression with two sides separated by an equals sign in the middle. The equals sign means both sides are the same.\",\"cssUrl\":\"/3e26151e-8cd9-466a-907f-43e1e928c4e8-en-0.css\",\"image\":null,\"isRootPath\":false,\"language\":\"en\",\"breadcrumbs\":[{\"path\":\"/drill\",\"h1\":\"Pen \u0026 paper exercises\",\"_key\":\"09bac112-9008-5368-8dda-35028d5916a1\"},{\"_key\":\"0ef35d09-f051-59f2-a098-f18928219db1\",\"path\":\"/drill/equations\",\"h1\":\"Equations\"},{\"path\":\"/drill/equations/what-is-an-equation\",\"h1\":\"What Is an Equation?\",\"_key\":\"3d101442-481b-591d-9a71-b9310ff6cf2f\"}],\"key\":\"content/en/drill/08 Equations/01MoveSwitch.tex\",\"path\":\"/drill/equations/what-is-an-equation\",\"title\":\"What Is an Equation?\",\"locale\":\"en\"},\"level\":\"1\",\"metaDescription\":\"An equation is a mathematical expression with two sides separated by an equals sign in the middle. The equals sign means both sides are the same.\",\"metaDescriptionActivity\":null,\"activities\":null},{\"metaDescription\":\"Now that you've gotten an overview of equations and the move-switch method, try out your new knowledge by solving these activities. See how well you score!\",\"metaDescriptionActivity\":null,\"activities\":null,\"assets\":null,\"name\":\"Equations Activities 1\",\"howContent\":null,\"encyclopediaArticle\":{\"type\":\"drill\",\"taskReference\":null,\"path\":\"/drill/equations/equations-activities-1\",\"h1\":\"Activities 1\",\"language\":\"en\",\"htmlContent\":{\"html\":\" \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-356000\\\"\u003e\u003c/a\u003e1.1)\u003c/h3\u003e Solve the equations:  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ej)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ek)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003el)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003c/dl\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-3\\\"\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ej)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ek)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                          \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003el)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-357000\\\"\u003e\u003c/a\u003e1.2)\u003c/h3\u003e Solve the equations:  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e                                                                                                                                                                                                                                                \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e7\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e7\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003c/dl\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-3\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e7\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e7\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     You can find the solutions \u003ca href=\\\"/drill/equations/equations-solutions\\\"\u003ehere\u003c/a type=\\\"punct\\\"\u003e. \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     \"},\"siblings\":[{\"h1\":\"What Is an Equation?\",\"path\":\"/drill/equations/what-is-an-equation\"},{\"h1\":\"Activities 1\",\"path\":\"/drill/equations/equations-activities-1\"},{\"h1\":\"Remove Number in Front of x\",\"path\":\"/drill/equations/remove-number-in-front-of-x\"},{\"h1\":\"Activities 2\",\"path\":\"/drill/equations/equations-activities-2\"},{\"h1\":\"Remove Number Under x\",\"path\":\"/drill/equations/remove-number-under-x\"},{\"h1\":\"Activities 3\",\"path\":\"/drill/equations/equations-activities-3\"},{\"h1\":\"Equations with Several Terms on Both Sides\",\"path\":\"/drill/equations/equations-with-several-terms-on-both-sides\"},{\"h1\":\"Activities 4\",\"path\":\"/drill/equations/equations-activities-4\"},{\"h1\":\"Equations with Fractions and Parentheses\",\"path\":\"/drill/equations/equations-with-fractions-and-parentheses\"},{\"h1\":\"Activities 5\",\"path\":\"/drill/equations/equations-activities-5\"},{\"h1\":\"Equations with x in the Denominator\",\"path\":\"/drill/equations/equations-with-x-in-the-denominator\"},{\"h1\":\"Activities 6\",\"path\":\"/drill/equations/equations-activities-6\"},{\"h1\":\"Checking the Answer\",\"path\":\"/drill/equations/checking-the-answer\"},{\"h1\":\"Activities 7\",\"path\":\"/drill/equations/equations-activities-7\"},{\"h1\":\"How to Solve Power Equations\",\"path\":\"/drill/equations/how-to-solve-power-equations\"},{\"h1\":\"Activities 8\",\"path\":\"/drill/equations/equations-activities-8\"},{\"h1\":\"Systems of Equations (Graphing)\",\"path\":\"/drill/equations/systems-of-equations-graphing\"},{\"h1\":\"Systems of Equations (Substitution)\",\"path\":\"/drill/equations/systems-of-equations-substitution\"},{\"h1\":\"Systems of Equations (Elimination)\",\"path\":\"/drill/equations/systems-of-equations-elimination\"},{\"h1\":\"Activities 9\",\"path\":\"/drill/equations/equations-activities-9\"},{\"h1\":\"Solutions\",\"path\":\"/drill/equations/equations-solutions\"}],\"title\":\"Equations Activities 1\",\"locale\":\"en\",\"breadcrumbs\":[{\"path\":\"/drill\",\"h1\":\"Pen \u0026 paper exercises\",\"_key\":\"09bac112-9008-5368-8dda-35028d5916a1\"},{\"path\":\"/drill/equations\",\"h1\":\"Equations\",\"_key\":\"0ef35d09-f051-59f2-a098-f18928219db1\"},{\"path\":\"/drill/equations/equations-activities-1\",\"h1\":\"Activities 1\",\"_key\":\"ddef2837-365e-53ef-aaf5-c1deff0b5b0f\"}],\"key\":\"content/en/drill/08 Equations/02EquationsActivities1.tex\",\"metaDescription\":\"Now that you've gotten an overview of equations and the move-switch method, try out your new knowledge by solving these activities. See how well you score!\",\"previewUrl\":\"https://images.houseofmath.com/eyJrZXkiOiJvdmVybGVhZi1hc3NldHMvcHJldmlldy8wMmVxdWF0aW9uc2FjdGl2aXRpZXMxLnBuZyIsImJ1Y2tldCI6ImhvbS1mcm9udGVuZC1hc3NldHMiLCJ2ZXJzaW9uIjozfQ==\",\"cssUrl\":\"/3e26151e-8cd9-466a-907f-43e1e928c4e8-en-0.css\",\"image\":null,\"isRootPath\":false,\"sharedLanguageKey\":null},\"level\":\"2\"},{\"assets\":null,\"name\":\"Remove Number in Front of x\",\"howContent\":null,\"encyclopediaArticle\":{\"h1\":\"Remove Number in Front of x\",\"metaDescription\":\"When you solve an equation with respect to a variable, for example x, it is necessary to get rid of the number before the x in order to determine its value.\",\"breadcrumbs\":[{\"h1\":\"Pen \u0026 paper exercises\",\"_key\":\"09bac112-9008-5368-8dda-35028d5916a1\",\"path\":\"/drill\"},{\"path\":\"/drill/equations\",\"h1\":\"Equations\",\"_key\":\"0ef35d09-f051-59f2-a098-f18928219db1\"},{\"path\":\"/drill/equations/remove-number-in-front-of-x\",\"h1\":\"Remove Number in Front of x\",\"_key\":\"cf291739-3610-54a6-9d87-083111d922a1\"}],\"image\":null,\"path\":\"/drill/equations/remove-number-in-front-of-x\",\"previewUrl\":\"https://images.houseofmath.com/eyJrZXkiOiJvdmVybGVhZi1hc3NldHMvcHJldmlldy8wM251bWJlcmJlZm9yZXgucG5nIiwiYnVja2V0IjoiaG9tLWZyb250ZW5kLWFzc2V0cyIsInZlcnNpb24iOjN9\",\"cssUrl\":\"/3e26151e-8cd9-466a-907f-43e1e928c4e8-en-0.css\",\"taskReference\":null,\"isRootPath\":false,\"locale\":\"en\",\"type\":\"drill\",\"htmlContent\":{\"html\":\"                                                                                                                                                                                                                                          \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     You’ve learned how to get rid of a \u003cspan  class=\\\"ec-lmri-12x-x-144\\\"\u003eterm \u003c/span\u003eon one side of an equation. But what do you do when you’re left with a number—known as a coefficient—in front of \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e? We’ll take a look at this situation below. \u003c/p\u003e      \u003cdiv class=\\\"tcolorbox foorule\\\" id=\\\"tcolobox-161\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     Rule\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e\u003ch3 class=\\\"rule-container-title\\\"\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eRemoving\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003ea\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eCoefficient\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003ein\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eFront\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eof\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003ea\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eVariable\u003c/span\u003e \u003c/h3\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e      \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e    1.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Move         all         the         terms         containing         only         numbers         over         to         one         side.         Remember         to         change         signs.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     2.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Move         all         terms         containing         the         variable—\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e,         for         example—to         the         other         side.         Remember         to         change         signs.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     3.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Simplify         both         sides.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     4.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Divide         both         sides         by         the         number         in         front         of         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e,         known         as         its         coefficient.         \u003c/dd\u003e\u003c/dl\u003e                                                                                                                      \u003c/div\u003e  \u003c/div\u003e                                                                                                                      \u003cp class=\\\"indent\\\" \u003e     Let’s take a look at an example and see what this looks like: \u003c/p\u003e      \u003cdiv class=\\\"tcolorbox fooexample\\\" id=\\\"tcolobox-162\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     Example 1\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                                 \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mtd\u003e                                                \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                     \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                \u003cmtd  class=\\\"align-label\\\"\u003e                                                 \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                          \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                \u003cmtd  class=\\\"align-label\\\"\u003e                                                 \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                          \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                     \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                \u003cmtd  class=\\\"align-label\\\"\u003e                                                 \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/mtd\u003e                                                     \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmfrac\u003e\u003cmrow  \u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                     \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                \u003cmtd  class=\\\"align-label\\\"\u003e                                                 \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmtext class=\\\"cancel\\\"\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mtext\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow  \u003e\u003cmtext class=\\\"cancel\\\"\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mtext\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/mtd\u003e                                                     \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmfrac\u003e\u003cmrow  \u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                     \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                \u003cmtd  class=\\\"align-label\\\"\u003e                                                 \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                           \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                     \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e                                                                                                                      \u003c/div\u003e  \u003c/div\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     \"},\"siblings\":[{\"h1\":\"What Is an Equation?\",\"path\":\"/drill/equations/what-is-an-equation\"},{\"h1\":\"Activities 1\",\"path\":\"/drill/equations/equations-activities-1\"},{\"h1\":\"Remove Number in Front of x\",\"path\":\"/drill/equations/remove-number-in-front-of-x\"},{\"h1\":\"Activities 2\",\"path\":\"/drill/equations/equations-activities-2\"},{\"h1\":\"Remove Number Under x\",\"path\":\"/drill/equations/remove-number-under-x\"},{\"h1\":\"Activities 3\",\"path\":\"/drill/equations/equations-activities-3\"},{\"h1\":\"Equations with Several Terms on Both Sides\",\"path\":\"/drill/equations/equations-with-several-terms-on-both-sides\"},{\"h1\":\"Activities 4\",\"path\":\"/drill/equations/equations-activities-4\"},{\"h1\":\"Equations with Fractions and Parentheses\",\"path\":\"/drill/equations/equations-with-fractions-and-parentheses\"},{\"h1\":\"Activities 5\",\"path\":\"/drill/equations/equations-activities-5\"},{\"h1\":\"Equations with x in the Denominator\",\"path\":\"/drill/equations/equations-with-x-in-the-denominator\"},{\"h1\":\"Activities 6\",\"path\":\"/drill/equations/equations-activities-6\"},{\"h1\":\"Checking the Answer\",\"path\":\"/drill/equations/checking-the-answer\"},{\"h1\":\"Activities 7\",\"path\":\"/drill/equations/equations-activities-7\"},{\"h1\":\"How to Solve Power Equations\",\"path\":\"/drill/equations/how-to-solve-power-equations\"},{\"h1\":\"Activities 8\",\"path\":\"/drill/equations/equations-activities-8\"},{\"h1\":\"Systems of Equations (Graphing)\",\"path\":\"/drill/equations/systems-of-equations-graphing\"},{\"h1\":\"Systems of Equations (Substitution)\",\"path\":\"/drill/equations/systems-of-equations-substitution\"},{\"h1\":\"Systems of Equations (Elimination)\",\"path\":\"/drill/equations/systems-of-equations-elimination\"},{\"h1\":\"Activities 9\",\"path\":\"/drill/equations/equations-activities-9\"},{\"h1\":\"Solutions\",\"path\":\"/drill/equations/equations-solutions\"}],\"sharedLanguageKey\":null,\"title\":\"Remove Number in Front of x\",\"language\":\"en\",\"key\":\"content/en/drill/08 Equations/03NumberBeforeX.tex\"},\"level\":\"3\",\"metaDescription\":\"When you solve an equation with respect to a variable, for example x, it is necessary to get rid of the number before the x in order to determine its value.\",\"metaDescriptionActivity\":null,\"activities\":null},{\"level\":\"4\",\"metaDescription\":\"Now that you have learned how to remove coefficients from in front of variables, try some exercises where you must accomplish this. How high can you score?\",\"metaDescriptionActivity\":null,\"activities\":null,\"assets\":null,\"name\":\"Equations Activities 2\",\"howContent\":null,\"encyclopediaArticle\":{\"sharedLanguageKey\":null,\"h1\":\"Activities 2\",\"language\":\"en\",\"isRootPath\":false,\"title\":\"Equations Activities 2\",\"previewUrl\":\"https://images.houseofmath.com/eyJrZXkiOiJvdmVybGVhZi1hc3NldHMvcHJldmlldy8wNGVxdWF0aW9uc2FjdGl2aXRpZXMyLnBuZyIsImJ1Y2tldCI6ImhvbS1mcm9udGVuZC1hc3NldHMiLCJ2ZXJzaW9uIjozfQ==\",\"htmlContent\":{\"html\":\" \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-358000\\\"\u003e\u003c/a\u003e2.1)\u003c/h3\u003e Solve the equations:  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e6\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e6\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003c/dl\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-3\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e6\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e6\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                          \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-359000\\\"\u003e\u003c/a\u003e2.2)\u003c/h3\u003e Solve the equations:  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e                                                                                                                                                                                                                                                \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e7\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e9\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e8\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003c/dl\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-3\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e7\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e9\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e8\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     You can find the solutions \u003ca href=\\\"/drill/equations/equations-solutions\\\"\u003ehere\u003c/a type=\\\"punct\\\"\u003e. \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     \"},\"breadcrumbs\":[{\"path\":\"/drill\",\"h1\":\"Pen \u0026 paper exercises\",\"_key\":\"09bac112-9008-5368-8dda-35028d5916a1\"},{\"path\":\"/drill/equations\",\"h1\":\"Equations\",\"_key\":\"0ef35d09-f051-59f2-a098-f18928219db1\"},{\"path\":\"/drill/equations/equations-activities-2\",\"h1\":\"Activities 2\",\"_key\":\"66082ccf-4b9c-5274-81b5-95cf7df3182e\"}],\"image\":null,\"siblings\":[{\"h1\":\"What Is an Equation?\",\"path\":\"/drill/equations/what-is-an-equation\"},{\"h1\":\"Activities 1\",\"path\":\"/drill/equations/equations-activities-1\"},{\"h1\":\"Remove Number in Front of x\",\"path\":\"/drill/equations/remove-number-in-front-of-x\"},{\"h1\":\"Activities 2\",\"path\":\"/drill/equations/equations-activities-2\"},{\"h1\":\"Remove Number Under x\",\"path\":\"/drill/equations/remove-number-under-x\"},{\"h1\":\"Activities 3\",\"path\":\"/drill/equations/equations-activities-3\"},{\"h1\":\"Equations with Several Terms on Both Sides\",\"path\":\"/drill/equations/equations-with-several-terms-on-both-sides\"},{\"h1\":\"Activities 4\",\"path\":\"/drill/equations/equations-activities-4\"},{\"h1\":\"Equations with Fractions and Parentheses\",\"path\":\"/drill/equations/equations-with-fractions-and-parentheses\"},{\"h1\":\"Activities 5\",\"path\":\"/drill/equations/equations-activities-5\"},{\"h1\":\"Equations with x in the Denominator\",\"path\":\"/drill/equations/equations-with-x-in-the-denominator\"},{\"h1\":\"Activities 6\",\"path\":\"/drill/equations/equations-activities-6\"},{\"h1\":\"Checking the Answer\",\"path\":\"/drill/equations/checking-the-answer\"},{\"h1\":\"Activities 7\",\"path\":\"/drill/equations/equations-activities-7\"},{\"h1\":\"How to Solve Power Equations\",\"path\":\"/drill/equations/how-to-solve-power-equations\"},{\"h1\":\"Activities 8\",\"path\":\"/drill/equations/equations-activities-8\"},{\"h1\":\"Systems of Equations (Graphing)\",\"path\":\"/drill/equations/systems-of-equations-graphing\"},{\"h1\":\"Systems of Equations (Substitution)\",\"path\":\"/drill/equations/systems-of-equations-substitution\"},{\"h1\":\"Systems of Equations (Elimination)\",\"path\":\"/drill/equations/systems-of-equations-elimination\"},{\"h1\":\"Activities 9\",\"path\":\"/drill/equations/equations-activities-9\"},{\"h1\":\"Solutions\",\"path\":\"/drill/equations/equations-solutions\"}],\"path\":\"/drill/equations/equations-activities-2\",\"type\":\"drill\",\"locale\":\"en\",\"metaDescription\":\"Now that you have learned how to remove coefficients from in front of variables, try some exercises where you must accomplish this. How high can you score?\",\"cssUrl\":\"/3e26151e-8cd9-466a-907f-43e1e928c4e8-en-0.css\",\"key\":\"content/en/drill/08 Equations/04EquationsActivities2.tex\",\"taskReference\":null}},{\"assets\":null,\"name\":\"Remove Number Under x\",\"howContent\":null,\"encyclopediaArticle\":{\"siblings\":[{\"h1\":\"What Is an Equation?\",\"path\":\"/drill/equations/what-is-an-equation\"},{\"h1\":\"Activities 1\",\"path\":\"/drill/equations/equations-activities-1\"},{\"h1\":\"Remove Number in Front of x\",\"path\":\"/drill/equations/remove-number-in-front-of-x\"},{\"h1\":\"Activities 2\",\"path\":\"/drill/equations/equations-activities-2\"},{\"h1\":\"Remove Number Under x\",\"path\":\"/drill/equations/remove-number-under-x\"},{\"h1\":\"Activities 3\",\"path\":\"/drill/equations/equations-activities-3\"},{\"h1\":\"Equations with Several Terms on Both Sides\",\"path\":\"/drill/equations/equations-with-several-terms-on-both-sides\"},{\"h1\":\"Activities 4\",\"path\":\"/drill/equations/equations-activities-4\"},{\"h1\":\"Equations with Fractions and Parentheses\",\"path\":\"/drill/equations/equations-with-fractions-and-parentheses\"},{\"h1\":\"Activities 5\",\"path\":\"/drill/equations/equations-activities-5\"},{\"h1\":\"Equations with x in the Denominator\",\"path\":\"/drill/equations/equations-with-x-in-the-denominator\"},{\"h1\":\"Activities 6\",\"path\":\"/drill/equations/equations-activities-6\"},{\"h1\":\"Checking the Answer\",\"path\":\"/drill/equations/checking-the-answer\"},{\"h1\":\"Activities 7\",\"path\":\"/drill/equations/equations-activities-7\"},{\"h1\":\"How to Solve Power Equations\",\"path\":\"/drill/equations/how-to-solve-power-equations\"},{\"h1\":\"Activities 8\",\"path\":\"/drill/equations/equations-activities-8\"},{\"h1\":\"Systems of Equations (Graphing)\",\"path\":\"/drill/equations/systems-of-equations-graphing\"},{\"h1\":\"Systems of Equations (Substitution)\",\"path\":\"/drill/equations/systems-of-equations-substitution\"},{\"h1\":\"Systems of Equations (Elimination)\",\"path\":\"/drill/equations/systems-of-equations-elimination\"},{\"h1\":\"Activities 9\",\"path\":\"/drill/equations/equations-activities-9\"},{\"h1\":\"Solutions\",\"path\":\"/drill/equations/equations-solutions\"}],\"locale\":\"en\",\"cssUrl\":\"/3e26151e-8cd9-466a-907f-43e1e928c4e8-en-0.css\",\"taskReference\":null,\"htmlContent\":{\"html\":\"                                                                                                                                                                                                                                          \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     Here you’ll learn how to get rid of the denominator of a fraction where a variable, such as \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e, is in the numerator. This is another form of isolating the variable that you need to learn in order to be able to solve equations. \u003c/p\u003e      \u003cdiv class=\\\"tcolorbox foorule\\\" id=\\\"tcolobox-163\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     Rule\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e\u003ch3 class=\\\"rule-container-title\\\"\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eRemoving\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003ea\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eDenominator\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003efrom\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eUnder\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003ea\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eVariable\u003c/span\u003e \u003c/h3\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e      \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e    1.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Move         all         the         terms         containing         only         numbers         over         to         one         side.         Remember         to         change         signs.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     2.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Move         all         terms         containing         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       to         the         opposite         side         of         from         the         terms         containing         only         numbers.         Remember         to         change         signs.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     3.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Simplify         both         sides.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     4.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Multiply         both         sides         by         the         denominator—the         number         that         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       is         divided         by.         \u003c/dd\u003e\u003c/dl\u003e                                                                                                                      \u003c/div\u003e  \u003c/div\u003e                                                                                                                           \u003cdiv class=\\\"tcolorbox fooexample\\\" id=\\\"tcolobox-164\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     Example 1\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                                 \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow  \u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/mtd\u003e                                                \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                      \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                \u003cmtd  class=\\\"align-label\\\"\u003e                                                 \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow  \u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/mtd\u003e                                                      \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                \u003cmtd  class=\\\"align-label\\\"\u003e                                                 \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow  \u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/mtd\u003e                                                      \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                      \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                \u003cmtd  class=\\\"align-label\\\"\u003e                                                 \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e⋅\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow  \u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/mtd\u003e                                                  \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e⋅\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                  \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                \u003cmtd  class=\\\"align-label\\\"\u003e                                                 \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmtext class=\\\"cancel\\\"\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mtext\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e⋅\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow  \u003e\u003cmtext class=\\\"cancel\\\"\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mtext\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/mtd\u003e                                                  \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e⋅\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                  \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                \u003cmtd  class=\\\"align-label\\\"\u003e                                                 \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                           \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                    \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e                                                                                                                      \u003c/div\u003e  \u003c/div\u003e                                                                                                                                                            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fraction.\",\"image\":null,\"type\":\"drill\",\"language\":\"en\",\"previewUrl\":\"https://images.houseofmath.com/eyJrZXkiOiJvdmVybGVhZi1hc3NldHMvcHJldmlldy8wNW51bWJlcnVuZGVyeC5wbmciLCJidWNrZXQiOiJob20tZnJvbnRlbmQtYXNzZXRzIiwidmVyc2lvbiI6M30=\",\"key\":\"content/en/drill/08 Equations/05NumberUnderX.tex\",\"title\":\"Remove Number Under x\",\"h1\":\"Remove Number Under x\"},\"level\":\"5\",\"metaDescription\":\"It is important to be able to isolate a variable with a coefficient, but it’s just as necessary to get rid of the denominator when a variable is in a fraction.\",\"metaDescriptionActivity\":null,\"activities\":null},{\"activities\":null,\"assets\":null,\"name\":\"Equations Activities 3\",\"howContent\":null,\"encyclopediaArticle\":{\"title\":\"Equations Activities 3\",\"type\":\"drill\",\"metaDescription\":\"You’ve learned the importance of getting rid of a denominator underneath a variable like x, so now, solve these activities to test your knowledge!\",\"cssUrl\":\"/3e26151e-8cd9-466a-907f-43e1e928c4e8-en-0.css\",\"htmlContent\":{\"html\":\" \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-360000\\\"\u003e\u003c/a\u003e3.1)\u003c/h3\u003e Solve the equations:  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e 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class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                          \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-361000\\\"\u003e\u003c/a\u003e3.2)\u003c/h3\u003e Solve the equations:  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e                                                                                                                                                                                                                                                \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e8\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e  \u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e  \u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e7\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003c/dl\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-3\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e8\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e  \u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e  \u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e7\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     You can find the solutions \u003ca href=\\\"/drill/equations/equations-solutions\\\"\u003ehere\u003c/a type=\\\"punct\\\"\u003e. \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     \"},\"taskReference\":null,\"sharedLanguageKey\":null,\"h1\":\"Activities 3\",\"key\":\"content/en/drill/08 Equations/06EquationsActivities3.tex\",\"locale\":\"en\",\"previewUrl\":\"https://images.houseofmath.com/eyJrZXkiOiJvdmVybGVhZi1hc3NldHMvcHJldmlldy8wNmVxdWF0aW9uc2FjdGl2aXRpZXMzLnBuZyIsImJ1Y2tldCI6ImhvbS1mcm9udGVuZC1hc3NldHMiLCJ2ZXJzaW9uIjozfQ==\",\"breadcrumbs\":[{\"path\":\"/drill\",\"h1\":\"Pen \u0026 paper exercises\",\"_key\":\"09bac112-9008-5368-8dda-35028d5916a1\"},{\"path\":\"/drill/equations\",\"h1\":\"Equations\",\"_key\":\"0ef35d09-f051-59f2-a098-f18928219db1\"},{\"path\":\"/drill/equations/equations-activities-3\",\"h1\":\"Activities 3\",\"_key\":\"d2aeda52-35ce-5bc1-81fa-4eba1a6f6fb9\"}],\"image\":null,\"siblings\":[{\"h1\":\"What Is an Equation?\",\"path\":\"/drill/equations/what-is-an-equation\"},{\"h1\":\"Activities 1\",\"path\":\"/drill/equations/equations-activities-1\"},{\"h1\":\"Remove Number in Front of x\",\"path\":\"/drill/equations/remove-number-in-front-of-x\"},{\"h1\":\"Activities 2\",\"path\":\"/drill/equations/equations-activities-2\"},{\"h1\":\"Remove Number Under x\",\"path\":\"/drill/equations/remove-number-under-x\"},{\"h1\":\"Activities 3\",\"path\":\"/drill/equations/equations-activities-3\"},{\"h1\":\"Equations with Several Terms on Both Sides\",\"path\":\"/drill/equations/equations-with-several-terms-on-both-sides\"},{\"h1\":\"Activities 4\",\"path\":\"/drill/equations/equations-activities-4\"},{\"h1\":\"Equations with Fractions and Parentheses\",\"path\":\"/drill/equations/equations-with-fractions-and-parentheses\"},{\"h1\":\"Activities 5\",\"path\":\"/drill/equations/equations-activities-5\"},{\"h1\":\"Equations with x in the Denominator\",\"path\":\"/drill/equations/equations-with-x-in-the-denominator\"},{\"h1\":\"Activities 6\",\"path\":\"/drill/equations/equations-activities-6\"},{\"h1\":\"Checking the Answer\",\"path\":\"/drill/equations/checking-the-answer\"},{\"h1\":\"Activities 7\",\"path\":\"/drill/equations/equations-activities-7\"},{\"h1\":\"How to Solve Power Equations\",\"path\":\"/drill/equations/how-to-solve-power-equations\"},{\"h1\":\"Activities 8\",\"path\":\"/drill/equations/equations-activities-8\"},{\"h1\":\"Systems of Equations (Graphing)\",\"path\":\"/drill/equations/systems-of-equations-graphing\"},{\"h1\":\"Systems of Equations (Substitution)\",\"path\":\"/drill/equations/systems-of-equations-substitution\"},{\"h1\":\"Systems of Equations (Elimination)\",\"path\":\"/drill/equations/systems-of-equations-elimination\"},{\"h1\":\"Activities 9\",\"path\":\"/drill/equations/equations-activities-9\"},{\"h1\":\"Solutions\",\"path\":\"/drill/equations/equations-solutions\"}],\"isRootPath\":false,\"path\":\"/drill/equations/equations-activities-3\",\"language\":\"en\"},\"level\":\"6\",\"metaDescription\":\"You’ve learned the importance of getting rid of a denominator underneath a variable like x, so now, solve these activities to test your knowledge!\",\"metaDescriptionActivity\":null},{\"metaDescription\":\"Equations often have several terms on both sides of the equal sign. It is important to be able to organize them correctly to simplify these equations.\",\"metaDescriptionActivity\":null,\"activities\":null,\"assets\":null,\"name\":\"Equations with Several Terms on Both Sides\",\"howContent\":null,\"encyclopediaArticle\":{\"title\":\"Equations with Several Terms on Both Sides\",\"cssUrl\":\"/3e26151e-8cd9-466a-907f-43e1e928c4e8-en-0.css\",\"breadcrumbs\":[{\"path\":\"/drill\",\"h1\":\"Pen \u0026 paper exercises\",\"_key\":\"09bac112-9008-5368-8dda-35028d5916a1\"},{\"path\":\"/drill/equations\",\"h1\":\"Equations\",\"_key\":\"0ef35d09-f051-59f2-a098-f18928219db1\"},{\"path\":\"/drill/equations/equations-with-several-terms-on-both-sides\",\"h1\":\"Equations with Several Terms on Both Sides\",\"_key\":\"d304ed40-4c8e-534c-a8c9-2c1d2485bd87\"}],\"sharedLanguageKey\":null,\"locale\":\"en\",\"image\":null,\"siblings\":[{\"h1\":\"What Is an Equation?\",\"path\":\"/drill/equations/what-is-an-equation\"},{\"h1\":\"Activities 1\",\"path\":\"/drill/equations/equations-activities-1\"},{\"h1\":\"Remove Number in Front of x\",\"path\":\"/drill/equations/remove-number-in-front-of-x\"},{\"h1\":\"Activities 2\",\"path\":\"/drill/equations/equations-activities-2\"},{\"h1\":\"Remove Number Under x\",\"path\":\"/drill/equations/remove-number-under-x\"},{\"h1\":\"Activities 3\",\"path\":\"/drill/equations/equations-activities-3\"},{\"h1\":\"Equations with Several Terms on Both Sides\",\"path\":\"/drill/equations/equations-with-several-terms-on-both-sides\"},{\"h1\":\"Activities 4\",\"path\":\"/drill/equations/equations-activities-4\"},{\"h1\":\"Equations with Fractions and Parentheses\",\"path\":\"/drill/equations/equations-with-fractions-and-parentheses\"},{\"h1\":\"Activities 5\",\"path\":\"/drill/equations/equations-activities-5\"},{\"h1\":\"Equations with x in the Denominator\",\"path\":\"/drill/equations/equations-with-x-in-the-denominator\"},{\"h1\":\"Activities 6\",\"path\":\"/drill/equations/equations-activities-6\"},{\"h1\":\"Checking the Answer\",\"path\":\"/drill/equations/checking-the-answer\"},{\"h1\":\"Activities 7\",\"path\":\"/drill/equations/equations-activities-7\"},{\"h1\":\"How to Solve Power Equations\",\"path\":\"/drill/equations/how-to-solve-power-equations\"},{\"h1\":\"Activities 8\",\"path\":\"/drill/equations/equations-activities-8\"},{\"h1\":\"Systems of Equations (Graphing)\",\"path\":\"/drill/equations/systems-of-equations-graphing\"},{\"h1\":\"Systems of Equations (Substitution)\",\"path\":\"/drill/equations/systems-of-equations-substitution\"},{\"h1\":\"Systems of Equations (Elimination)\",\"path\":\"/drill/equations/systems-of-equations-elimination\"},{\"h1\":\"Activities 9\",\"path\":\"/drill/equations/equations-activities-9\"},{\"h1\":\"Solutions\",\"path\":\"/drill/equations/equations-solutions\"}],\"isRootPath\":false,\"type\":\"drill\",\"h1\":\"Equations with Several Terms on Both Sides\",\"taskReference\":null,\"key\":\"content/en/drill/08 Equations/07TermsOnBothSides.tex\",\"path\":\"/drill/equations/equations-with-several-terms-on-both-sides\",\"language\":\"en\",\"metaDescription\":\"Equations often have several terms on both sides of the equal sign. It is important to be able to organize them correctly to simplify these equations.\",\"previewUrl\":\"https://images.houseofmath.com/eyJrZXkiOiJvdmVybGVhZi1hc3NldHMvcHJldmlldy8wN3Rlcm1zb25ib3Roc2lkZXMucG5nIiwiYnVja2V0IjoiaG9tLWZyb250ZW5kLWFzc2V0cyIsInZlcnNpb24iOjN9\",\"htmlContent\":{\"html\":\"                                                                                                                                                                                                                                          \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     When there are unknowns on both sides of the equal sign, you have to make sure these end up on the same side of the equal sign to make it possible to solve them. It doesn’t matter which side you choose, but the most common is the left-hand side. \u003c/p\u003e      \u003cdiv class=\\\"tcolorbox fooqaexample\\\" id=\\\"tcolobox-165\\\"\u003e   \u003ca   id=\\\"x1-361014x\\\"\u003e\u003c/a\u003e\u003ca   id=\\\"x1-361014xdoc\\\"\u003e\u003c/a\u003e  \u003cdiv class=\\\"tcolorbox-title\\\"\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     Example 1\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e\u003cb\u003e \u003ch3 class=\\\"example-container-title\\\"\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eSolving\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eEquations\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003ewith\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eSeveral\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eTerms\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eon\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eBoth\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eSides\u003c/span\u003e \u003c/h3\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eSolve\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ethe\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eequation\u003c/span\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003c/math\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e\u003c/b\u003e\u003c/p\u003e                                                                                               \u003cdiv class=\\\"lowerbox\\\"\u003e                                                                                                                       \u003ctable class=\\\"equation-star\\\"\u003e\u003ctr\u003e\u003ctd\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" class=\\\"equation\\\"\u003e                                        \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e \u003c/math\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/table\u003e \u003cp class=\\\"noindent\\\" \u003eAdd equal terms: \u003c/p\u003e\u003ctable class=\\\"equation-star\\\"\u003e\u003ctr\u003e\u003ctd\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" class=\\\"equation\\\"\u003e                                               \u003cmstyle mathcolor=\\\"#E60000\\\"\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mstyle\u003e\u003cmstyle mathcolor=\\\"#0056EB\\\"\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003c/mstyle\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmstyle mathcolor=\\\"#E60000\\\"\u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mstyle\u003e\u003cmstyle mathcolor=\\\"#0056EB\\\"\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mstyle\u003e \u003c/math\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/table\u003e \u003cp class=\\\"noindent\\\" \u003e\u003ca href=\\\"/drill/equations/what-is-an-equation\\\"\u003eChange side, change sign\u003c/a type=\\\"divide\\\"\u003e: \u003c/p\u003e\u003ctable class=\\\"equation-star\\\"\u003e\u003ctr\u003e\u003ctd\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" class=\\\"equation\\\"\u003e                                               \u003cmstyle mathcolor=\\\"#E60000\\\"\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mstyle\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmstyle mathcolor=\\\"#0056EB\\\"\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003c/mstyle\u003e \u003c/math\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/table\u003e \u003cp class=\\\"noindent\\\" \u003eAdd equal terms: \u003c/p\u003e\u003ctable class=\\\"equation-star\\\"\u003e\u003ctr\u003e\u003ctd\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" class=\\\"equation\\\"\u003e                                                    \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e \u003c/math\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/table\u003e \u003cp class=\\\"noindent\\\" \u003e\u003ca href=\\\"/drill/equations/remove-number-in-front-of-x\\\"\u003eGet rid of the number in front of \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e\u003c/a type=\\\"divide\\\"\u003e: \u003c/p\u003e\u003ctable class=\\\"equation-star\\\"\u003e\u003ctr\u003e\u003ctd\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" class=\\\"equation\\\"\u003e                                                  \u003cmfrac\u003e\u003cmrow  \u003e\u003cmtext class=\\\"cancel\\\"\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mtext\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow  \u003e\u003cmtext class=\\\"cancel\\\"\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mtext\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e  \u003cmfrac\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/table\u003e \u003cp class=\\\"noindent\\\" \u003ePut the minus sign next to the fraction: \u003c/p\u003e\u003ctable class=\\\"equation-star\\\"\u003e\u003ctr\u003e\u003ctd\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" class=\\\"equation\\\"\u003e                                                    \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow  \u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/table\u003e  \u003c/div\u003e  \u003c/div\u003e  \u003c/div\u003e                                                                                                                      \u003cp class=\\\"indent\\\" \u003e     Look at \u003ca  href=\\\"#\\\"\u003eExample 1\u003c/a\u003e above. First you tidy up the equation, so that terms containing \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e are on one side, and terms containing only numbers are on the other side. Then you add the terms together. That makes it look solvable—and it’s a simple matter to clean up the rest. \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     \"}},\"level\":\"7\"},{\"level\":\"8\",\"metaDescription\":\"Solve equations regarding terms on both sides of the equal sign.\",\"metaDescriptionActivity\":null,\"activities\":null,\"assets\":null,\"name\":\"Equations Activities 4\",\"howContent\":null,\"encyclopediaArticle\":{\"isRootPath\":false,\"path\":\"/drill/equations/equations-activities-4\",\"h1\":\"Activities 4\",\"language\":\"en\",\"taskReference\":null,\"image\":null,\"siblings\":[{\"h1\":\"What Is an Equation?\",\"path\":\"/drill/equations/what-is-an-equation\"},{\"h1\":\"Activities 1\",\"path\":\"/drill/equations/equations-activities-1\"},{\"h1\":\"Remove Number in Front of x\",\"path\":\"/drill/equations/remove-number-in-front-of-x\"},{\"h1\":\"Activities 2\",\"path\":\"/drill/equations/equations-activities-2\"},{\"h1\":\"Remove Number Under x\",\"path\":\"/drill/equations/remove-number-under-x\"},{\"h1\":\"Activities 3\",\"path\":\"/drill/equations/equations-activities-3\"},{\"h1\":\"Equations with Several Terms on Both Sides\",\"path\":\"/drill/equations/equations-with-several-terms-on-both-sides\"},{\"h1\":\"Activities 4\",\"path\":\"/drill/equations/equations-activities-4\"},{\"h1\":\"Equations with Fractions and Parentheses\",\"path\":\"/drill/equations/equations-with-fractions-and-parentheses\"},{\"h1\":\"Activities 5\",\"path\":\"/drill/equations/equations-activities-5\"},{\"h1\":\"Equations with x in the Denominator\",\"path\":\"/drill/equations/equations-with-x-in-the-denominator\"},{\"h1\":\"Activities 6\",\"path\":\"/drill/equations/equations-activities-6\"},{\"h1\":\"Checking the Answer\",\"path\":\"/drill/equations/checking-the-answer\"},{\"h1\":\"Activities 7\",\"path\":\"/drill/equations/equations-activities-7\"},{\"h1\":\"How to Solve Power Equations\",\"path\":\"/drill/equations/how-to-solve-power-equations\"},{\"h1\":\"Activities 8\",\"path\":\"/drill/equations/equations-activities-8\"},{\"h1\":\"Systems of Equations (Graphing)\",\"path\":\"/drill/equations/systems-of-equations-graphing\"},{\"h1\":\"Systems of Equations (Substitution)\",\"path\":\"/drill/equations/systems-of-equations-substitution\"},{\"h1\":\"Systems of Equations (Elimination)\",\"path\":\"/drill/equations/systems-of-equations-elimination\"},{\"h1\":\"Activities 9\",\"path\":\"/drill/equations/equations-activities-9\"},{\"h1\":\"Solutions\",\"path\":\"/drill/equations/equations-solutions\"}],\"breadcrumbs\":[{\"h1\":\"Pen \u0026 paper exercises\",\"_key\":\"09bac112-9008-5368-8dda-35028d5916a1\",\"path\":\"/drill\"},{\"path\":\"/drill/equations\",\"h1\":\"Equations\",\"_key\":\"0ef35d09-f051-59f2-a098-f18928219db1\"},{\"_key\":\"18545069-2c6c-5f23-9e72-fcc44003ec2f\",\"path\":\"/drill/equations/equations-activities-4\",\"h1\":\"Activities 4\"}],\"key\":\"content/en/drill/08 Equations/08EquationsActivities4.tex\",\"sharedLanguageKey\":null,\"title\":\"Equations Activities 4\",\"metaDescription\":\"Solve equations regarding terms on both sides of the equal sign.\",\"cssUrl\":\"/3e26151e-8cd9-466a-907f-43e1e928c4e8-en-0.css\",\"htmlContent\":{\"html\":\" \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-362000\\\"\u003e\u003c/a\u003e4.1)\u003c/h3\u003e Solve the equations:  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e                                                                                                                                                                                                                                                \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  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class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e8\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e8\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ej)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003c/dl\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e                                                                                                                                                                                                                                          \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-363000\\\"\u003e\u003c/a\u003e4.2)\u003c/h3\u003e Solve the equations:  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e9\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003c/dl\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e9\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     You can find the solutions \u003ca href=\\\"/drill/equations/equations-solutions\\\"\u003ehere\u003c/a type=\\\"punct\\\"\u003e. \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     \"},\"locale\":\"en\",\"type\":\"drill\",\"previewUrl\":\"https://images.houseofmath.com/eyJrZXkiOiJvdmVybGVhZi1hc3NldHMvcHJldmlldy8wOGVxdWF0aW9uc2FjdGl2aXRpZXM0LnBuZyIsImJ1Y2tldCI6ImhvbS1mcm9udGVuZC1hc3NldHMiLCJ2ZXJzaW9uIjozfQ==\"}},{\"metaDescription\":\"Equations may include both fractions and parentheses, and it is important to be able to work with all the terms to end up with the right answer.\",\"metaDescriptionActivity\":null,\"activities\":null,\"assets\":null,\"name\":\"Equations with Fractions and Parentheses\",\"howContent\":null,\"encyclopediaArticle\":{\"isRootPath\":false,\"image\":null,\"siblings\":[{\"h1\":\"What Is an Equation?\",\"path\":\"/drill/equations/what-is-an-equation\"},{\"h1\":\"Activities 1\",\"path\":\"/drill/equations/equations-activities-1\"},{\"h1\":\"Remove Number in Front of x\",\"path\":\"/drill/equations/remove-number-in-front-of-x\"},{\"h1\":\"Activities 2\",\"path\":\"/drill/equations/equations-activities-2\"},{\"h1\":\"Remove Number Under x\",\"path\":\"/drill/equations/remove-number-under-x\"},{\"h1\":\"Activities 3\",\"path\":\"/drill/equations/equations-activities-3\"},{\"h1\":\"Equations with Several Terms on Both Sides\",\"path\":\"/drill/equations/equations-with-several-terms-on-both-sides\"},{\"h1\":\"Activities 4\",\"path\":\"/drill/equations/equations-activities-4\"},{\"h1\":\"Equations with Fractions and Parentheses\",\"path\":\"/drill/equations/equations-with-fractions-and-parentheses\"},{\"h1\":\"Activities 5\",\"path\":\"/drill/equations/equations-activities-5\"},{\"h1\":\"Equations with x in the Denominator\",\"path\":\"/drill/equations/equations-with-x-in-the-denominator\"},{\"h1\":\"Activities 6\",\"path\":\"/drill/equations/equations-activities-6\"},{\"h1\":\"Checking the Answer\",\"path\":\"/drill/equations/checking-the-answer\"},{\"h1\":\"Activities 7\",\"path\":\"/drill/equations/equations-activities-7\"},{\"h1\":\"How to Solve Power Equations\",\"path\":\"/drill/equations/how-to-solve-power-equations\"},{\"h1\":\"Activities 8\",\"path\":\"/drill/equations/equations-activities-8\"},{\"h1\":\"Systems of Equations (Graphing)\",\"path\":\"/drill/equations/systems-of-equations-graphing\"},{\"h1\":\"Systems of Equations (Substitution)\",\"path\":\"/drill/equations/systems-of-equations-substitution\"},{\"h1\":\"Systems of Equations (Elimination)\",\"path\":\"/drill/equations/systems-of-equations-elimination\"},{\"h1\":\"Activities 9\",\"path\":\"/drill/equations/equations-activities-9\"},{\"h1\":\"Solutions\",\"path\":\"/drill/equations/equations-solutions\"}],\"language\":\"en\",\"metaDescription\":\"Equations may include both fractions and parentheses, and it is important to be able to work with all the terms to end up with the right answer.\",\"taskReference\":null,\"title\":\"Equations with Fractions and Parentheses\",\"locale\":\"en\",\"type\":\"drill\",\"h1\":\"Equations with Fractions and Parentheses\",\"previewUrl\":\"https://images.houseofmath.com/eyJrZXkiOiJvdmVybGVhZi1hc3NldHMvcHJldmlldy8wOWZyYWN0aW9ucGFyZW50aGVzZXMucG5nIiwiYnVja2V0IjoiaG9tLWZyb250ZW5kLWFzc2V0cyIsInZlcnNpb24iOjN9\",\"htmlContent\":{\"html\":\" \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     Here, you’ll learn how to solve equations that contain \u003ca href=\\\"/drill/fractions/what-is-a-fraction\\\"\u003efractions\u003c/a\u003e. The only major difference from what you’ve done so far is that you must find a \u003ca href=\\\"/drill/fractions/common-denominator\\\"\u003ecommon denominator\u003c/a\u003e and multiply all the terms by it. This will allow you to cancel out the denominators and isolate the variable. The whole point of this method is to get rid of the fractions, which simplifies the calculations! \u003c/p\u003e      \u003cdiv class=\\\"tcolorbox foorule\\\" id=\\\"tcolobox-166\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     Rule\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e\u003ch3 class=\\\"rule-container-title\\\"\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eSolving\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eEquations\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003ewith\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eFractions\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eand\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eParentheses\u003c/span\u003e \u003c/h3\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e      \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e    1.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Find         the         common         denominator.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     2.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Multiply         all         terms         by         the         common         denominator         and         simplify         the         denominators.         If         there’s         anything         left         of         the         common         denominator,         you         have         to         multiply         the         rest         by         the         numerator.         Notice         how         I         put         \u003ca href=\\\"/drill/parentheses/why-parentheses\\\"\u003eparentheses\u003c/a\u003e         around         the         numerators.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     3.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Think         \u003ca href=\\\"/encyclopedia/numbers-and-quantities/arithmetic/calculation-order/order-of-operations-pemdas\\\"\u003ePEMDAS\u003c/a\u003e!         Solve         the         parentheses         first.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     4.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Move         all         the         terms         with         only         numbers         to         one         side.         Remember         to         change         signs.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     5.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Move         all         the         terms         containing         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       to         the         other         side.         Remember         to         change         signs.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     6.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Simplify         both         sides.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     7.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Multiply         or         divide         both         sides         by         whatever         number         is         preventing         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       from         standing         by         itself.         \u003c/dd\u003e\u003c/dl\u003e                                                                                                                      \u003c/div\u003e  \u003c/div\u003e                                                                                                                           \u003cdiv class=\\\"tcolorbox fooqaexample\\\" id=\\\"tcolobox-167\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e \u003cp class=\\\"indent\\\" \u003e     Example 1\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e\u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eSolve\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ethe\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eequation\u003c/span\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/mstyle\u003e\u003c/mstyle\u003e\u003c/math\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e\u003c/b\u003e\u003c/p\u003e                                                                                               \u003cdiv class=\\\"lowerbox\\\"\u003e                                                                                                                                                                                                                                           \u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                           \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow  \u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mtd\u003e                                            \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow  \u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                               \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                          \u003cmtd  class=\\\"align-label\\\"\u003e                                           \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmspace width=\\\"-0.17em\\\" class=\\\"negthinspace\\\"/\u003e \u003cmrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"prefix\\\"\u003e(\u003c/mo\u003e\u003cmrow\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow  \u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e 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columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                          \u003cmtd  class=\\\"align-label\\\"\u003e                                           \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmtext class=\\\"cancel\\\"\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mtext\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow  \u003e\u003cmtext class=\\\"cancel\\\"\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mtext\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mtd\u003e                                           \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e \u003cmo  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\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                           \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                          \u003cmtd  class=\\\"align-label\\\"\u003e                                           \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                                \u003cmtd  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class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                          \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e                                                                                                                      \u003c/div\u003e  \u003c/div\u003e  \u003c/div\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     \"},\"breadcrumbs\":[{\"path\":\"/drill\",\"h1\":\"Pen \u0026 paper exercises\",\"_key\":\"09bac112-9008-5368-8dda-35028d5916a1\"},{\"h1\":\"Equations\",\"_key\":\"0ef35d09-f051-59f2-a098-f18928219db1\",\"path\":\"/drill/equations\"},{\"_key\":\"7707591c-1958-5563-95fe-05ca86eaf4b7\",\"path\":\"/drill/equations/equations-with-fractions-and-parentheses\",\"h1\":\"Equations with Fractions and Parentheses\"}],\"sharedLanguageKey\":null,\"path\":\"/drill/equations/equations-with-fractions-and-parentheses\",\"key\":\"content/en/drill/08 Equations/09FractionParentheses.tex\",\"cssUrl\":\"/3e26151e-8cd9-466a-907f-43e1e928c4e8-en-0.css\"},\"level\":\"9\"},{\"name\":\"Equations Activities 5\",\"howContent\":null,\"encyclopediaArticle\":{\"metaDescription\":\"Armed with the knowledge of how to work with equations that contain fractions, now try solving these activities and find out just how much you know.\",\"htmlContent\":{\"html\":\" \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-364000\\\"\u003e\u003c/a\u003e5.1)\u003c/h3\u003e Solve the equations:  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e    \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e    \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e     \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e     \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e    \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e     \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e    \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  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\u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e      \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e     \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e9\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003c/math\u003e       \u003c/dd\u003e\u003c/dl\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e    \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e    \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e     \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e     \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e    \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e     \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e    \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e    \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e     \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e                                                                                                                                                                                                                                          \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e      \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e     \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e9\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-365000\\\"\u003e\u003c/a\u003e5.2)\u003c/h3\u003e Solve the equations:  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e                                                                                                                                                                                                                                                \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e7\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmspace width=\\\"-0.17em\\\" class=\\\"negthinspace\\\"/\u003e \u003cmrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"prefix\\\"\u003e(\u003c/mo\u003e\u003cmrow\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"postfix\\\"\u003e)\u003c/mo\u003e\u003c/mrow\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmspace width=\\\"-0.17em\\\" class=\\\"negthinspace\\\"/\u003e \u003cmrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"prefix\\\"\u003e(\u003c/mo\u003e\u003cmrow\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/mrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"postfix\\\"\u003e)\u003c/mo\u003e\u003c/mrow\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e6\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmspace width=\\\"-0.17em\\\" class=\\\"negthinspace\\\"/\u003e \u003cmrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"prefix\\\"\u003e(\u003c/mo\u003e\u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/mrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"postfix\\\"\u003e)\u003c/mo\u003e\u003c/mrow\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e9\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e       \u003c/dd\u003e\u003c/dl\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e7\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmspace width=\\\"-0.17em\\\" class=\\\"negthinspace\\\"/\u003e \u003cmrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"prefix\\\"\u003e(\u003c/mo\u003e\u003cmrow\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"postfix\\\"\u003e)\u003c/mo\u003e\u003c/mrow\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmspace width=\\\"-0.17em\\\" class=\\\"negthinspace\\\"/\u003e \u003cmrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"prefix\\\"\u003e(\u003c/mo\u003e\u003cmrow\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/mrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"postfix\\\"\u003e)\u003c/mo\u003e\u003c/mrow\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e6\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmspace width=\\\"-0.17em\\\" class=\\\"negthinspace\\\"/\u003e \u003cmrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"prefix\\\"\u003e(\u003c/mo\u003e\u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/mrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"postfix\\\"\u003e)\u003c/mo\u003e\u003c/mrow\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e9\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e       \u003c/dd\u003e\u003c/dl\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     You can find the solutions \u003ca href=\\\"/drill/equations/equations-solutions\\\"\u003ehere\u003c/a type=\\\"punct\\\"\u003e. \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     \"},\"key\":\"content/en/drill/08 Equations/10EquationsActivities5.tex\",\"type\":\"drill\",\"h1\":\"Activities 5\",\"cssUrl\":\"/3e26151e-8cd9-466a-907f-43e1e928c4e8-en-0.css\",\"image\":null,\"siblings\":[{\"h1\":\"What Is an Equation?\",\"path\":\"/drill/equations/what-is-an-equation\"},{\"h1\":\"Activities 1\",\"path\":\"/drill/equations/equations-activities-1\"},{\"h1\":\"Remove Number in Front of x\",\"path\":\"/drill/equations/remove-number-in-front-of-x\"},{\"h1\":\"Activities 2\",\"path\":\"/drill/equations/equations-activities-2\"},{\"h1\":\"Remove Number Under x\",\"path\":\"/drill/equations/remove-number-under-x\"},{\"h1\":\"Activities 3\",\"path\":\"/drill/equations/equations-activities-3\"},{\"h1\":\"Equations with Several Terms on Both Sides\",\"path\":\"/drill/equations/equations-with-several-terms-on-both-sides\"},{\"h1\":\"Activities 4\",\"path\":\"/drill/equations/equations-activities-4\"},{\"h1\":\"Equations with Fractions and Parentheses\",\"path\":\"/drill/equations/equations-with-fractions-and-parentheses\"},{\"h1\":\"Activities 5\",\"path\":\"/drill/equations/equations-activities-5\"},{\"h1\":\"Equations with x in the Denominator\",\"path\":\"/drill/equations/equations-with-x-in-the-denominator\"},{\"h1\":\"Activities 6\",\"path\":\"/drill/equations/equations-activities-6\"},{\"h1\":\"Checking the Answer\",\"path\":\"/drill/equations/checking-the-answer\"},{\"h1\":\"Activities 7\",\"path\":\"/drill/equations/equations-activities-7\"},{\"h1\":\"How to Solve Power Equations\",\"path\":\"/drill/equations/how-to-solve-power-equations\"},{\"h1\":\"Activities 8\",\"path\":\"/drill/equations/equations-activities-8\"},{\"h1\":\"Systems of Equations (Graphing)\",\"path\":\"/drill/equations/systems-of-equations-graphing\"},{\"h1\":\"Systems of Equations (Substitution)\",\"path\":\"/drill/equations/systems-of-equations-substitution\"},{\"h1\":\"Systems of Equations (Elimination)\",\"path\":\"/drill/equations/systems-of-equations-elimination\"},{\"h1\":\"Activities 9\",\"path\":\"/drill/equations/equations-activities-9\"},{\"h1\":\"Solutions\",\"path\":\"/drill/equations/equations-solutions\"}],\"isRootPath\":false,\"path\":\"/drill/equations/equations-activities-5\",\"title\":\"Equations Activities 5\",\"language\":\"en\",\"locale\":\"en\",\"breadcrumbs\":[{\"path\":\"/drill\",\"h1\":\"Pen \u0026 paper exercises\",\"_key\":\"09bac112-9008-5368-8dda-35028d5916a1\"},{\"path\":\"/drill/equations\",\"h1\":\"Equations\",\"_key\":\"0ef35d09-f051-59f2-a098-f18928219db1\"},{\"path\":\"/drill/equations/equations-activities-5\",\"h1\":\"Activities 5\",\"_key\":\"079b88ef-f3f8-57a3-b137-8323456d6a27\"}],\"taskReference\":null,\"sharedLanguageKey\":null,\"previewUrl\":\"https://images.houseofmath.com/eyJrZXkiOiJvdmVybGVhZi1hc3NldHMvcHJldmlldy8xMGVxdWF0aW9uc2FjdGl2aXRpZXM1LnBuZyIsImJ1Y2tldCI6ImhvbS1mcm9udGVuZC1hc3NldHMiLCJ2ZXJzaW9uIjozfQ==\"},\"level\":\"10\",\"metaDescription\":\"Armed with the knowledge of how to work with equations that contain fractions, now try solving these activities and find out just how much you know.\",\"metaDescriptionActivity\":null,\"activities\":null,\"assets\":null},{\"name\":\"Equations with x in the Denominator\",\"howContent\":null,\"encyclopediaArticle\":{\"siblings\":[{\"h1\":\"What Is an Equation?\",\"path\":\"/drill/equations/what-is-an-equation\"},{\"h1\":\"Activities 1\",\"path\":\"/drill/equations/equations-activities-1\"},{\"h1\":\"Remove Number in Front of x\",\"path\":\"/drill/equations/remove-number-in-front-of-x\"},{\"h1\":\"Activities 2\",\"path\":\"/drill/equations/equations-activities-2\"},{\"h1\":\"Remove Number Under x\",\"path\":\"/drill/equations/remove-number-under-x\"},{\"h1\":\"Activities 3\",\"path\":\"/drill/equations/equations-activities-3\"},{\"h1\":\"Equations with Several Terms on Both Sides\",\"path\":\"/drill/equations/equations-with-several-terms-on-both-sides\"},{\"h1\":\"Activities 4\",\"path\":\"/drill/equations/equations-activities-4\"},{\"h1\":\"Equations with Fractions and Parentheses\",\"path\":\"/drill/equations/equations-with-fractions-and-parentheses\"},{\"h1\":\"Activities 5\",\"path\":\"/drill/equations/equations-activities-5\"},{\"h1\":\"Equations with x in the Denominator\",\"path\":\"/drill/equations/equations-with-x-in-the-denominator\"},{\"h1\":\"Activities 6\",\"path\":\"/drill/equations/equations-activities-6\"},{\"h1\":\"Checking the Answer\",\"path\":\"/drill/equations/checking-the-answer\"},{\"h1\":\"Activities 7\",\"path\":\"/drill/equations/equations-activities-7\"},{\"h1\":\"How to Solve Power Equations\",\"path\":\"/drill/equations/how-to-solve-power-equations\"},{\"h1\":\"Activities 8\",\"path\":\"/drill/equations/equations-activities-8\"},{\"h1\":\"Systems of Equations (Graphing)\",\"path\":\"/drill/equations/systems-of-equations-graphing\"},{\"h1\":\"Systems of Equations (Substitution)\",\"path\":\"/drill/equations/systems-of-equations-substitution\"},{\"h1\":\"Systems of Equations (Elimination)\",\"path\":\"/drill/equations/systems-of-equations-elimination\"},{\"h1\":\"Activities 9\",\"path\":\"/drill/equations/equations-activities-9\"},{\"h1\":\"Solutions\",\"path\":\"/drill/equations/equations-solutions\"}],\"sharedLanguageKey\":null,\"path\":\"/drill/equations/equations-with-x-in-the-denominator\",\"type\":\"drill\",\"language\":\"en\",\"previewUrl\":\"https://images.houseofmath.com/eyJrZXkiOiJvdmVybGVhZi1hc3NldHMvcHJldmlldy8xMXhpbmRlbm9taW5hdG9yLnBuZyIsImJ1Y2tldCI6ImhvbS1mcm9udGVuZC1hc3NldHMiLCJ2ZXJzaW9uIjozfQ==\",\"breadcrumbs\":[{\"path\":\"/drill\",\"h1\":\"Pen \u0026 paper exercises\",\"_key\":\"09bac112-9008-5368-8dda-35028d5916a1\"},{\"_key\":\"0ef35d09-f051-59f2-a098-f18928219db1\",\"path\":\"/drill/equations\",\"h1\":\"Equations\"},{\"path\":\"/drill/equations/equations-with-x-in-the-denominator\",\"h1\":\"Equations with x in the Denominator\",\"_key\":\"3fc42a72-b95c-583e-83ea-133098cd709b\"}],\"h1\":\"Equations with x in the Denominator\",\"metaDescription\":\"Sometimes, equations will contain terms where x is in the denominator. You still use the common denominator, but this time, it includes x in it.\",\"htmlContent\":{\"html\":\" \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     Having learned how to use common denominators to get rid of fractions in equations, you might be wondering how to isolate a variable that is \u003cspan  class=\\\"ec-lmri-12x-x-144\\\"\u003ein the denominator. \u003c/span\u003eThis is a great question! \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     The good news is that the approach is the same as with getting rid of a denominator that contains only numbers! To find the common denominator, you multiply all the different factors once. Here’s two examples: \u003c/p\u003e      \u003cdiv class=\\\"tcolorbox fooqaexample\\\" id=\\\"tcolobox-168\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     Example 1\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e\u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eSolve\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ethe\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eequation\u003c/span\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003c/math\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e\u003c/b\u003e\u003c/p\u003e                                                                                               \u003cdiv class=\\\"lowerbox\\\"\u003e                                                                                                                                                                                                                                           \u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                                  \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/mtd\u003e                                                     \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                     \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                 \u003cmtd  class=\\\"align-label\\\"\u003e                                                  \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e⋅\u003c/mo\u003e \u003cmfrac\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/mtd\u003e                                                 \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e⋅\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                 \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                 \u003cmtd  class=\\\"align-label\\\"\u003e                                                  \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mtd\u003e                                                      \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                    \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                 \u003cmtd  class=\\\"align-label\\\"\u003e                                                  \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow  \u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/mtd\u003e                                                      \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmfrac\u003e\u003cmrow  \u003e\u003cmtext class=\\\"cancel\\\"\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mtext\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow  \u003e\u003cmtext class=\\\"cancel\\\"\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mtext\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                   \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                 \u003cmtd  class=\\\"align-label\\\"\u003e                                                  \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow  \u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/mtd\u003e                                                      \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                     \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                 \u003cmtd  class=\\\"align-label\\\"\u003e                                                  \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                                      \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmfrac\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow  \u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                     \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                 \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e                                                                                                                      \u003c/div\u003e  \u003c/div\u003e  \u003c/div\u003e                                                                                                                                                                                                                                               \u003cdiv class=\\\"tcolorbox fooqaexample\\\" id=\\\"tcolobox-169\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e \u003cp class=\\\"indent\\\" \u003e     Example 2\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e\u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eSolve\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ethe\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eequation\u003c/span\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e    \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e   \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e    \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003c/math\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003efor\u003c/span\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003c/math\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e\u003c/b\u003e\u003c/p\u003e                                                                               \u003cdiv class=\\\"lowerbox\\\"\u003e                                                                                                                                                                                                                                           \u003cp class=\\\"noindent\\\" \u003eThe common denominator is \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e. Multiply both sides of the equation by the common denominator:  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                          \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                                         \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmphantom\u003e  \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e  \u003c/mphantom\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003cmspace width=\\\"-0.17em\\\" class=\\\"negthinspace\\\"/\u003e \u003cmrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"prefix\\\"\u003e(\u003c/mo\u003e\u003cmrow\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e    \u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e   \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"postfix\\\"\u003e)\u003c/mo\u003e\u003c/mrow\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                         \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                         \u003cmtd  class=\\\"align-label\\\"\u003e                                          \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                                         \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003cmspace width=\\\"-0.17em\\\" class=\\\"negthinspace\\\"/\u003e \u003cmrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"prefix\\\"\u003e(\u003c/mo\u003e\u003cmrow\u003e   \u003cmfrac\u003e\u003cmrow  \u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"postfix\\\"\u003e)\u003c/mo\u003e\u003c/mrow\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                         \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                         \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003cdiv class=\\\"wide\\\"\u003e  \u003c/p\u003e\u003ctable class=\\\"equation-star\\\"\u003e\u003ctr\u003e\u003ctd\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" class=\\\"equation\\\"\u003e                             \u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e⋅\u003c/mo\u003e\u003cmspace width=\\\"-0.17em\\\" class=\\\"negthinspace\\\"/\u003e\u003cmrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"prefix\\\"\u003e(\u003c/mo\u003e\u003cmrow\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e    \u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e   \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"postfix\\\"\u003e)\u003c/mo\u003e\u003c/mrow\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e⋅\u003c/mo\u003e\u003cmspace width=\\\"-0.17em\\\" class=\\\"negthinspace\\\"/\u003e\u003cmrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"prefix\\\"\u003e(\u003c/mo\u003e\u003cmrow\u003e  \u003cmfrac\u003e\u003cmrow  \u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"postfix\\\"\u003e)\u003c/mo\u003e\u003c/mrow\u003e \u003c/math\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/table\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e  This expands to  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                    \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                                   \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmphantom\u003e  \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e  \u003c/mphantom\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e⋅\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e     \u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e   \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e⋅\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                   \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                   \u003cmtd  class=\\\"align-label\\\"\u003e                                    \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                                   \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e⋅\u003c/mo\u003e  \u003cmfrac\u003e\u003cmrow  \u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e⋅\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                   \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                   \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003cdiv class=\\\"wide\\\"\u003e  \u003c/p\u003e\u003ctable class=\\\"equation-star\\\"\u003e\u003ctr\u003e\u003ctd\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" class=\\\"equation\\\"\u003e                \u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e⋅\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e     \u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e   \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e⋅\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e⋅\u003c/mo\u003e  \u003cmfrac\u003e\u003cmrow  \u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e⋅\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e \u003c/math\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/table\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e  Now, you can cancel some factors:  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                      \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                                     \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmphantom\u003e  \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e  \u003c/mphantom\u003e \u003cmtext class=\\\"cancel\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtext\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e    \u003cmrow  \u003e\u003cmtext class=\\\"cancel\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtext\u003e\u003c/mrow\u003e\u003c/mfrac\u003e   \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                     \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                     \u003cmtd  class=\\\"align-label\\\"\u003e                                      \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                                     \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003cmtext class=\\\"cancel\\\"\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/mtext\u003e   \u003cmfrac\u003e\u003cmrow  \u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow  \u003e\u003cmtext class=\\\"cancel\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mtext\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                     \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                     \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003cdiv class=\\\"wide\\\"\u003e  \u003c/p\u003e\u003ctable class=\\\"equation-star\\\"\u003e\u003ctr\u003e\u003ctd\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" class=\\\"equation\\\"\u003e                     \u003cmtext class=\\\"cancel\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtext\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e    \u003cmrow  \u003e\u003cmtext class=\\\"cancel\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtext\u003e\u003c/mrow\u003e\u003c/mfrac\u003e   \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003cmtext class=\\\"cancel\\\"\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/mtext\u003e   \u003cmfrac\u003e\u003cmrow  \u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow  \u003e\u003cmtext class=\\\"cancel\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mtext\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e \u003c/math\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/table\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e  Now the expression simplifies to  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                         \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                                        \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmphantom\u003e  \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e  \u003c/mphantom\u003e \u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                        \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                        \u003cmtd  class=\\\"align-label\\\"\u003e                                         \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                                        \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                    \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                        \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003cdiv class=\\\"wide\\\"\u003e  \u003c/p\u003e\u003ctable class=\\\"equation-star\\\"\u003e\u003ctr\u003e\u003ctd\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" class=\\\"equation\\\"\u003e                               \u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003c/math\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/table\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e  Isolate all the variables on one side and the constants on the other:  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                      \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e\u003c/mtd\u003e                                     \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                 \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                     \u003cmtd  class=\\\"align-label\\\"\u003e                                      \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                                                  \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                     \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                     \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003cdiv class=\\\"wide\\\"\u003e  \u003c/p\u003e\u003ctable class=\\\"equation-star\\\"\u003e\u003ctr\u003e\u003ctd\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" class=\\\"equation\\\"\u003e                              \u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e \u003c/math\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/table\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e  This simplifies to \u003c/p\u003e\u003ctable class=\\\"equation-star\\\"\u003e\u003ctr\u003e\u003ctd\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" class=\\\"equation\\\"\u003e                                                   \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e \u003c/math\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/table\u003e \u003cp class=\\\"noindent\\\" \u003eFinally, \u003ca href=\\\"/drill/equations/remove-number-in-front-of-x\\\"\u003eget rid of the number in front of \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e\u003c/a type=\\\"divide\\\"\u003e: \u003c/p\u003e\u003ctable class=\\\"equation-star\\\"\u003e\u003ctr\u003e\u003ctd\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" class=\\\"equation\\\"\u003e                                              \u003cmfrac\u003e\u003cmrow  \u003e\u003cmtext class=\\\"cancel\\\"\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mtext\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow  \u003e\u003cmtext class=\\\"cancel\\\"\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mtext\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmfrac\u003e\u003cmrow  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmfrac\u003e\u003cmrow  \u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/table\u003e \u003cp class=\\\"noindent\\\" \u003eTherefore, \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmfrac\u003e\u003cmrow  \u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math type=\\\"punct\\\"\u003e. \u003c/p\u003e                                                                                                                     \u003c/div\u003e  \u003c/div\u003e  \u003c/div\u003e                                                                                                                      \u003cp class=\\\"indent\\\" \u003e     \"},\"taskReference\":null,\"cssUrl\":\"/3e26151e-8cd9-466a-907f-43e1e928c4e8-en-0.css\",\"image\":null,\"key\":\"content/en/drill/08 Equations/11XInDenominator.tex\",\"title\":\"Equations with x in the Denominator\",\"locale\":\"en\",\"isRootPath\":false},\"level\":\"11\",\"metaDescription\":\"Sometimes, equations will contain terms where x is in the denominator. You still use the common denominator, but this time, it includes x in it.\",\"metaDescriptionActivity\":null,\"activities\":null,\"assets\":null},{\"howContent\":null,\"encyclopediaArticle\":{\"isRootPath\":false,\"breadcrumbs\":[{\"path\":\"/drill\",\"h1\":\"Pen \u0026 paper exercises\",\"_key\":\"09bac112-9008-5368-8dda-35028d5916a1\"},{\"path\":\"/drill/equations\",\"h1\":\"Equations\",\"_key\":\"0ef35d09-f051-59f2-a098-f18928219db1\"},{\"path\":\"/drill/equations/equations-activities-6\",\"h1\":\"Activities 6\",\"_key\":\"3e066da4-f3d1-5ef1-9e41-88bb12169290\"}],\"taskReference\":null,\"title\":\"Equations Activities 6\",\"h1\":\"Activities 6\",\"locale\":\"en\",\"metaDescription\":\"Solving equations where there is a variable in the denominator is definitely on the complex side. Work through these exercises to make sure you’ve mastered it!\",\"previewUrl\":\"https://images.houseofmath.com/eyJrZXkiOiJvdmVybGVhZi1hc3NldHMvcHJldmlldy8xMmVxdWF0aW9uc2FjdGl2aXRpZXM2LnBuZyIsImJ1Y2tldCI6ImhvbS1mcm9udGVuZC1hc3NldHMiLCJ2ZXJzaW9uIjozfQ==\",\"image\":null,\"key\":\"content/en/drill/08 Equations/12EquationsActivities6.tex\",\"sharedLanguageKey\":null,\"siblings\":[{\"h1\":\"What Is an Equation?\",\"path\":\"/drill/equations/what-is-an-equation\"},{\"h1\":\"Activities 1\",\"path\":\"/drill/equations/equations-activities-1\"},{\"h1\":\"Remove Number in Front of x\",\"path\":\"/drill/equations/remove-number-in-front-of-x\"},{\"h1\":\"Activities 2\",\"path\":\"/drill/equations/equations-activities-2\"},{\"h1\":\"Remove Number Under x\",\"path\":\"/drill/equations/remove-number-under-x\"},{\"h1\":\"Activities 3\",\"path\":\"/drill/equations/equations-activities-3\"},{\"h1\":\"Equations with Several Terms on Both Sides\",\"path\":\"/drill/equations/equations-with-several-terms-on-both-sides\"},{\"h1\":\"Activities 4\",\"path\":\"/drill/equations/equations-activities-4\"},{\"h1\":\"Equations with Fractions and Parentheses\",\"path\":\"/drill/equations/equations-with-fractions-and-parentheses\"},{\"h1\":\"Activities 5\",\"path\":\"/drill/equations/equations-activities-5\"},{\"h1\":\"Equations with x in the Denominator\",\"path\":\"/drill/equations/equations-with-x-in-the-denominator\"},{\"h1\":\"Activities 6\",\"path\":\"/drill/equations/equations-activities-6\"},{\"h1\":\"Checking the Answer\",\"path\":\"/drill/equations/checking-the-answer\"},{\"h1\":\"Activities 7\",\"path\":\"/drill/equations/equations-activities-7\"},{\"h1\":\"How to Solve Power Equations\",\"path\":\"/drill/equations/how-to-solve-power-equations\"},{\"h1\":\"Activities 8\",\"path\":\"/drill/equations/equations-activities-8\"},{\"h1\":\"Systems of Equations (Graphing)\",\"path\":\"/drill/equations/systems-of-equations-graphing\"},{\"h1\":\"Systems of Equations (Substitution)\",\"path\":\"/drill/equations/systems-of-equations-substitution\"},{\"h1\":\"Systems of Equations (Elimination)\",\"path\":\"/drill/equations/systems-of-equations-elimination\"},{\"h1\":\"Activities 9\",\"path\":\"/drill/equations/equations-activities-9\"},{\"h1\":\"Solutions\",\"path\":\"/drill/equations/equations-solutions\"}],\"language\":\"en\",\"htmlContent\":{\"html\":\" \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-366000\\\"\u003e\u003c/a\u003e6.1)\u003c/h3\u003e Solve the equations:  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e 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class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003c/dl\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-3\\\"\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e7\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e9\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                          \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-367000\\\"\u003e\u003c/a\u003e6.2)\u003c/h3\u003e Solve the equations:  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e                                                                                                                                                                                                                                                \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e  \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e9\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e  \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003c/dl\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-3\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e  \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e9\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e  \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     You can find the solutions \u003ca href=\\\"/drill/equations/equations-solutions\\\"\u003ehere\u003c/a type=\\\"punct\\\"\u003e. \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     \"},\"path\":\"/drill/equations/equations-activities-6\",\"type\":\"drill\",\"cssUrl\":\"/3e26151e-8cd9-466a-907f-43e1e928c4e8-en-0.css\"},\"level\":\"12\",\"metaDescription\":\"Solving equations where there is a variable in the denominator is definitely on the complex side. Work through these exercises to make sure you’ve mastered it!\",\"metaDescriptionActivity\":null,\"activities\":null,\"assets\":null,\"name\":\"Equations Activities 6\"},{\"level\":\"13\",\"metaDescription\":\"You can check the answer of an equation you've solved by substituting x in the original equation with the answer to see if you get the same results.\",\"metaDescriptionActivity\":null,\"activities\":null,\"assets\":null,\"name\":\"Checking the Answer\",\"howContent\":null,\"encyclopediaArticle\":{\"path\":\"/drill/equations/checking-the-answer\",\"title\":\"Checking the Answer\",\"h1\":\"Checking the Answer\",\"language\":\"en\",\"metaDescription\":\"You can check the answer of an equation you've solved by substituting x in the original equation with the answer to see if you get the same results.\",\"image\":null,\"siblings\":[{\"h1\":\"What Is an Equation?\",\"path\":\"/drill/equations/what-is-an-equation\"},{\"h1\":\"Activities 1\",\"path\":\"/drill/equations/equations-activities-1\"},{\"h1\":\"Remove Number in Front of x\",\"path\":\"/drill/equations/remove-number-in-front-of-x\"},{\"h1\":\"Activities 2\",\"path\":\"/drill/equations/equations-activities-2\"},{\"h1\":\"Remove Number Under x\",\"path\":\"/drill/equations/remove-number-under-x\"},{\"h1\":\"Activities 3\",\"path\":\"/drill/equations/equations-activities-3\"},{\"h1\":\"Equations with Several Terms on Both Sides\",\"path\":\"/drill/equations/equations-with-several-terms-on-both-sides\"},{\"h1\":\"Activities 4\",\"path\":\"/drill/equations/equations-activities-4\"},{\"h1\":\"Equations with Fractions and Parentheses\",\"path\":\"/drill/equations/equations-with-fractions-and-parentheses\"},{\"h1\":\"Activities 5\",\"path\":\"/drill/equations/equations-activities-5\"},{\"h1\":\"Equations with x in the Denominator\",\"path\":\"/drill/equations/equations-with-x-in-the-denominator\"},{\"h1\":\"Activities 6\",\"path\":\"/drill/equations/equations-activities-6\"},{\"h1\":\"Checking the Answer\",\"path\":\"/drill/equations/checking-the-answer\"},{\"h1\":\"Activities 7\",\"path\":\"/drill/equations/equations-activities-7\"},{\"h1\":\"How to Solve Power Equations\",\"path\":\"/drill/equations/how-to-solve-power-equations\"},{\"h1\":\"Activities 8\",\"path\":\"/drill/equations/equations-activities-8\"},{\"h1\":\"Systems of Equations (Graphing)\",\"path\":\"/drill/equations/systems-of-equations-graphing\"},{\"h1\":\"Systems of Equations (Substitution)\",\"path\":\"/drill/equations/systems-of-equations-substitution\"},{\"h1\":\"Systems of Equations (Elimination)\",\"path\":\"/drill/equations/systems-of-equations-elimination\"},{\"h1\":\"Activities 9\",\"path\":\"/drill/equations/equations-activities-9\"},{\"h1\":\"Solutions\",\"path\":\"/drill/equations/equations-solutions\"}],\"key\":\"content/en/drill/08 Equations/13CheckingTheAnswer.tex\",\"type\":\"drill\",\"htmlContent\":{\"html\":\"                                                                                                                                                                                                                                          \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     After you’ve solved an equation, you can check the answer by substituting the answer you got for \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e into the equation. Then, you check to see if you get the same result on both the left-hand and the right-hand side. \u003c/p\u003e      \u003cdiv class=\\\"tcolorbox fooqaexample\\\" id=\\\"tcolobox-170\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e \u003cp class=\\\"indent\\\" \u003e     Example 1\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e\u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eCheck\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eif\u003c/span\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003c/math\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eis\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003esolution\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eto\u003c/span\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/mstyle\u003e\u003c/mstyle\u003e\u003c/math\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e\u003c/b\u003e\u003c/p\u003e                                                                                               \u003cdiv class=\\\"lowerbox\\\"\u003e                                                                                                                                                                                                                                           \u003cp class=\\\"noindent\\\" \u003eSubstituting \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e on the left-hand side gives you \u003c/p\u003e\u003ctable class=\\\"equation-star\\\"\u003e\u003ctr\u003e\u003ctd\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" class=\\\"equation\\\"\u003e\u003cmfrac\u003e\u003cmrow\u003e                                         \u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003c/math\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/table\u003e \u003cp class=\\\"noindent\\\" \u003eSubstituting \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e on the right-hand side gives you  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                              \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/mtd\u003e                                             \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e⋅\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e    \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                             \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                             \u003cmtd  class=\\\"align-label\\\"\u003e                                              \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                                                      \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                 \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                             \u003cmtd  class=\\\"align-label\\\"\u003e                                              \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                                                      \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                 \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                             \u003cmtd  class=\\\"align-label\\\"\u003e                                              \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                                                      \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                       \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                             \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003cdiv class=\\\"wide\\\"\u003e  \u003c/p\u003e\u003ctable class=\\\"equation-star\\\"\u003e\u003ctr\u003e\u003ctd\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" class=\\\"equation\\\"\u003e                                \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e⋅\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e    \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e   \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003c/math\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/table\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e  This means that both the left-hand side and right-hand side are equal to 2 when you substitute 3 for \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e. You’ve now checked the answer, and since both sides are equal, it means that \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e is a correct solution. \u003c/p\u003e                                                                                               \u003c/div\u003e  \u003c/div\u003e  \u003c/div\u003e                                                                                                                      \u003cp class=\\\"indent\\\" \u003e     \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eNote!\u003c/span\u003e\u003c/b\u003e It is possible for there to be more than one solution for \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e in many equations, especially those where \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e is raised to a \u003ca href=\\\"/encyclopedia/algebra/basic-algebra/powers/what-are-the-power-rules-for-variables\\\"\u003epower\u003c/a type=\\\"punct\\\"\u003e. \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     \"},\"previewUrl\":\"https://images.houseofmath.com/eyJrZXkiOiJvdmVybGVhZi1hc3NldHMvcHJldmlldy8xM2NoZWNraW5ndGhlYW5zd2VyLnBuZyIsImJ1Y2tldCI6ImhvbS1mcm9udGVuZC1hc3NldHMiLCJ2ZXJzaW9uIjozfQ==\",\"cssUrl\":\"/3e26151e-8cd9-466a-907f-43e1e928c4e8-en-0.css\",\"sharedLanguageKey\":null,\"locale\":\"en\",\"breadcrumbs\":[{\"path\":\"/drill\",\"h1\":\"Pen \u0026 paper exercises\",\"_key\":\"09bac112-9008-5368-8dda-35028d5916a1\"},{\"path\":\"/drill/equations\",\"h1\":\"Equations\",\"_key\":\"0ef35d09-f051-59f2-a098-f18928219db1\"},{\"path\":\"/drill/equations/checking-the-answer\",\"h1\":\"Checking the Answer\",\"_key\":\"8538886d-bf3b-5ddf-bbc5-d51b693093e6\"}],\"taskReference\":null,\"isRootPath\":false}},{\"howContent\":null,\"encyclopediaArticle\":{\"taskReference\":null,\"siblings\":[{\"h1\":\"What Is an Equation?\",\"path\":\"/drill/equations/what-is-an-equation\"},{\"h1\":\"Activities 1\",\"path\":\"/drill/equations/equations-activities-1\"},{\"h1\":\"Remove Number in Front of x\",\"path\":\"/drill/equations/remove-number-in-front-of-x\"},{\"h1\":\"Activities 2\",\"path\":\"/drill/equations/equations-activities-2\"},{\"h1\":\"Remove Number Under x\",\"path\":\"/drill/equations/remove-number-under-x\"},{\"h1\":\"Activities 3\",\"path\":\"/drill/equations/equations-activities-3\"},{\"h1\":\"Equations with Several Terms on Both Sides\",\"path\":\"/drill/equations/equations-with-several-terms-on-both-sides\"},{\"h1\":\"Activities 4\",\"path\":\"/drill/equations/equations-activities-4\"},{\"h1\":\"Equations with Fractions and Parentheses\",\"path\":\"/drill/equations/equations-with-fractions-and-parentheses\"},{\"h1\":\"Activities 5\",\"path\":\"/drill/equations/equations-activities-5\"},{\"h1\":\"Equations with x in the Denominator\",\"path\":\"/drill/equations/equations-with-x-in-the-denominator\"},{\"h1\":\"Activities 6\",\"path\":\"/drill/equations/equations-activities-6\"},{\"h1\":\"Checking the Answer\",\"path\":\"/drill/equations/checking-the-answer\"},{\"h1\":\"Activities 7\",\"path\":\"/drill/equations/equations-activities-7\"},{\"h1\":\"How to Solve Power Equations\",\"path\":\"/drill/equations/how-to-solve-power-equations\"},{\"h1\":\"Activities 8\",\"path\":\"/drill/equations/equations-activities-8\"},{\"h1\":\"Systems of Equations (Graphing)\",\"path\":\"/drill/equations/systems-of-equations-graphing\"},{\"h1\":\"Systems of Equations (Substitution)\",\"path\":\"/drill/equations/systems-of-equations-substitution\"},{\"h1\":\"Systems of Equations (Elimination)\",\"path\":\"/drill/equations/systems-of-equations-elimination\"},{\"h1\":\"Activities 9\",\"path\":\"/drill/equations/equations-activities-9\"},{\"h1\":\"Solutions\",\"path\":\"/drill/equations/equations-solutions\"}],\"key\":\"content/en/drill/08 Equations/14EquationsActivities7.tex\",\"path\":\"/drill/equations/equations-activities-7\",\"title\":\"Equations Activities 7\",\"language\":\"en\",\"image\":null,\"isRootPath\":false,\"sharedLanguageKey\":null,\"type\":\"drill\",\"previewUrl\":\"https://images.houseofmath.com/eyJrZXkiOiJvdmVybGVhZi1hc3NldHMvcHJldmlldy8xNGVxdWF0aW9uc2FjdGl2aXRpZXM3LnBuZyIsImJ1Y2tldCI6ImhvbS1mcm9udGVuZC1hc3NldHMiLCJ2ZXJzaW9uIjozfQ==\",\"htmlContent\":{\"html\":\" \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e 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display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003c/dl\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\" type=\\\"punct\\\"\u003e.\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\" type=\\\"punct\\\"\u003e.\u003c/mo\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\" type=\\\"punct\\\"\u003e.\u003c/mo\u003e\u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e8\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\" type=\\\"punct\\\"\u003e.\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e7\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ej)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ek)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003el)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003em)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003en)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eo)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e                                                                                                                                                                                                                                          \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-369000\\\"\u003e\u003c/a\u003e7.2)\u003c/h3\u003e Solve the equations and check the answer:  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003c/dl\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-370000\\\"\u003e\u003c/a\u003e7.3)\u003c/h3\u003e Solve the equations and check the answer:  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e6\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmspace width=\\\"-0.17em\\\" class=\\\"negthinspace\\\"/\u003e \u003cmrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"prefix\\\"\u003e(\u003c/mo\u003e\u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/mrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"postfix\\\"\u003e)\u003c/mo\u003e\u003c/mrow\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003cmspace width=\\\"-0.17em\\\" class=\\\"negthinspace\\\"/\u003e \u003cmrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"prefix\\\"\u003e(\u003c/mo\u003e\u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e8\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"postfix\\\"\u003e)\u003c/mo\u003e\u003c/mrow\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmspace width=\\\"-0.17em\\\" class=\\\"negthinspace\\\"/\u003e \u003cmrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"prefix\\\"\u003e(\u003c/mo\u003e\u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/mrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"postfix\\\"\u003e)\u003c/mo\u003e\u003c/mrow\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003c/dl\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e6\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmspace width=\\\"-0.17em\\\" class=\\\"negthinspace\\\"/\u003e \u003cmrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"prefix\\\"\u003e(\u003c/mo\u003e\u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/mrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"postfix\\\"\u003e)\u003c/mo\u003e\u003c/mrow\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003cmspace width=\\\"-0.17em\\\" class=\\\"negthinspace\\\"/\u003e \u003cmrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"prefix\\\"\u003e(\u003c/mo\u003e\u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e8\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"postfix\\\"\u003e)\u003c/mo\u003e\u003c/mrow\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmspace width=\\\"-0.17em\\\" class=\\\"negthinspace\\\"/\u003e \u003cmrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"prefix\\\"\u003e(\u003c/mo\u003e\u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/mrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"postfix\\\"\u003e)\u003c/mo\u003e\u003c/mrow\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e                                                                                                                                                                                                                                               \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-371000\\\"\u003e\u003c/a\u003e7.4)\u003c/h3\u003e Solve the equations and check the answer:  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e7\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e9\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003c/dl\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e7\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e9\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e                                                                                                                                                                                                                                               \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-372000\\\"\u003e\u003c/a\u003e7.5)\u003c/h3\u003e Solve the equations and check the answer: \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e8\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e8\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e9\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e8\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e7\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmrow  \u003e\u003cmtable  class=\\\"aligned\\\"\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e8\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/mtd\u003e     \u003cmtd columnalign=\\\"right\\\" \u003e\u003c/mtd\u003e \u003c/mtr\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/mtd\u003e \u003c/mtr\u003e                                                                                                                   \u003c/mtable\u003e\u003c/mrow\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmrow  \u003e\u003cmtable  class=\\\"aligned\\\"\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"left\\\" \u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e9\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003c/mtd\u003e \u003c/mtr\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/mtd\u003e \u003c/mtr\u003e                                                                                                                   \u003c/mtable\u003e\u003c/mrow\u003e\u003c/math\u003e       \u003c/dd\u003e\u003c/dl\u003e \u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-373000\\\"\u003e\u003c/a\u003e7.6)\u003c/h3\u003e Solve the equations and check the answer: \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e                                                                                                                                                                                                                                                \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmrow  \u003e\u003cmtable  class=\\\"aligned\\\"\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"left\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003c/mtd\u003e \u003c/mtr\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/mtd\u003e \u003c/mtr\u003e                                                                                                                   \u003c/mtable\u003e\u003c/mrow\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e     \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e     \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e7\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e    \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e    \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e      \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e    \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                            \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmspace width=\\\"-0.17em\\\" class=\\\"negthinspace\\\"/\u003e \u003cmrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"prefix\\\"\u003e(\u003c/mo\u003e\u003cmrow\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e    \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e   \u003c/mrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"postfix\\\"\u003e)\u003c/mo\u003e\u003c/mrow\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmspace width=\\\"-0.17em\\\" class=\\\"negthinspace\\\"/\u003e\u003cmrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"prefix\\\"\u003e(\u003c/mo\u003e\u003cmrow\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/mrow\u003e\u003cmo fence=\\\"true\\\" form=\\\"postfix\\\"\u003e)\u003c/mo\u003e\u003c/mrow\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003c/dl\u003e \u003cp class=\\\"indent\\\" \u003e     You can find the solutions \u003ca href=\\\"/drill/equations/equations-solutions\\\"\u003ehere\u003c/a type=\\\"punct\\\"\u003e. \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     \"},\"breadcrumbs\":[{\"path\":\"/drill\",\"h1\":\"Pen \u0026 paper exercises\",\"_key\":\"09bac112-9008-5368-8dda-35028d5916a1\"},{\"h1\":\"Equations\",\"_key\":\"0ef35d09-f051-59f2-a098-f18928219db1\",\"path\":\"/drill/equations\"},{\"path\":\"/drill/equations/equations-activities-7\",\"h1\":\"Activities 7\",\"_key\":\"59928457-b515-5ba5-8fbd-2f2dd38446c0\"}],\"h1\":\"Activities 7\",\"locale\":\"en\",\"metaDescription\":\"Practice the process of checking the answer to an equation by solving these exercises. See if you can sleuth out which of these solutions aren’t quite right!\",\"cssUrl\":\"/3e26151e-8cd9-466a-907f-43e1e928c4e8-en-0.css\"},\"level\":\"14\",\"metaDescription\":\"Practice the process of checking the answer to an equation by solving these exercises. See if you can sleuth out which of these solutions aren’t quite right!\",\"metaDescriptionActivity\":null,\"activities\":null,\"assets\":null,\"name\":\"Equations Activities 7\"},{\"name\":\"How to Solve Power Equations\",\"howContent\":null,\"encyclopediaArticle\":{\"metaDescription\":\"Exponential equations require you to have a mastery of quadratic rules, move and switch, and isolating the variable in order to be able to solve them.\",\"cssUrl\":\"/3e26151e-8cd9-466a-907f-43e1e928c4e8-en-0.css\",\"htmlContent\":{\"html\":\" \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     \u003cspan  class=\\\"ec-lmri-12x-x-144\\\"\u003ePower equations\u003c/span\u003e, or quadratic equations without a first degree term, are super fun to solve. You need to have control of \u003ca href=\\\"/encyclopedia/numbers-and-quantities/arithmetic/powers-and-roots/how-square-roots-work\\\"\u003eroots\u003c/a\u003e to be able to find the answer without any aids. You also need to have control of the \u003ca href=\\\"/drill/equations/what-is-an-equation\\\"\u003echange side, change sign rule\u003c/a\u003e and \u003ca href=\\\"/drill/equations/remove-number-in-front-of-x\\\"\u003eisolating variables\u003c/a type=\\\"punct\\\"\u003e. \u003c/p\u003e      \u003cdiv class=\\\"tcolorbox foorule\\\" id=\\\"tcolobox-171\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     Rule\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e\u003ch3 class=\\\"rule-container-title\\\"\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003ePower\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eEquations\u003c/span\u003e \u003c/h3\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ea\u003c/mi\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003eb\u003c/mi\u003e\u003c/mtd\u003e                                    \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                      \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                              \u003cmtd  class=\\\"align-label\\\"\u003e                                               \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                          \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmsqrt\u003e\u003cmrow\u003e\u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmfrac\u003e \u003cmrow  \u003e \u003cmi  \u003eb\u003c/mi\u003e\u003c/mrow\u003e \u003cmrow  \u003e\u003cmi  \u003ea\u003c/mi\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/mrow\u003e\u003c/msqrt\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                    \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                    \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e                                                                                              \u003c/div\u003e  \u003c/div\u003e                                                                                                                                                                                                                                               \u003cdiv class=\\\"tcolorbox fooexample\\\" id=\\\"tcolobox-172\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e \u003cp class=\\\"indent\\\" \u003e     Example 1\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                                   \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e\u003c/mtd\u003e                                                                      \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmn\u003e9\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                     \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                  \u003cmtd  class=\\\"align-label\\\"\u003e                                                   \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmsqrt\u003e\u003cmrow\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e\u003c/mrow\u003e\u003c/msqrt\u003e\u003c/mtd\u003e                                                                  \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmsqrt\u003e\u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/mrow\u003e\u003c/msqrt\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                  \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                  \u003cmtd  class=\\\"align-label\\\"\u003e                                                   \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                          \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e7\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                    \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                  \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e                                                                                                                      \u003c/div\u003e  \u003c/div\u003e      \u003cdiv class=\\\"tcolorbox fooexample\\\" id=\\\"tcolobox-173\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     Example 2\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                                   \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e\u003c/mtd\u003e                                                                    \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e9\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                     \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                  \u003cmtd  class=\\\"align-label\\\"\u003e                                                   \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e\u003c/mrow\u003e   \u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003c/mtd\u003e                                                   \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmfrac\u003e\u003cmrow  \u003e\u003cmn\u003e9\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                    \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                  \u003cmtd  class=\\\"align-label\\\"\u003e                                                   \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e\u003c/mtd\u003e                                                                      \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmn\u003e9\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                     \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                  \u003cmtd  class=\\\"align-label\\\"\u003e                                                   \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmsqrt\u003e\u003cmrow\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e\u003c/mrow\u003e\u003c/msqrt\u003e\u003c/mtd\u003e                                                                  \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmsqrt\u003e\u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/mrow\u003e\u003c/msqrt\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                  \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                  \u003cmtd  class=\\\"align-label\\\"\u003e                                                   \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                          \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e7\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                    \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                                  \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e                                                                                                                      \u003c/div\u003e  \u003c/div\u003e      \u003cdiv class=\\\"tcolorbox fooqathink\\\" id=\\\"tcolobox-174\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     Think About This\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e\u003cb\u003e \u003ch3 class=\\\"think-container-title\\\"\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eThe\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eRoot\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eof\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003ea\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eNegative\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eNumber\u003c/span\u003e \u003c/h3\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eWhy\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003edo\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eyou\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ethink\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ewe\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ecan’t\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eget\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ethe\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003esquare\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eroot\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eof\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003enegative\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003enumber?\u003c/span\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e\u003c/b\u003e\u003c/p\u003e                                                                                               \u003cdiv class=\\\"lowerbox\\\"\u003e                                                                                                                       \u003cp class=\\\"noindent\\\" \u003eAny  square  root  is  calculated  such  that  \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmsqrt\u003e\u003cmrow\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ea\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e\u003c/mrow\u003e\u003c/msqrt\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmi  \u003ea\u003c/mi\u003e\u003c/math\u003e.  Any  number  raised  to  the  power  of  2  always  becomes  a  positive  number,  since  \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmo  class=\\\"MathClass-bin\\\"\u003e×\u003c/mo\u003e\u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e\u003c/math\u003e.  This  means  that  \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ea\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e\u0026#x003E;\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e,  even  if  \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ea\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e\u0026#x003C;\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math type=\\\"punct\\\"\u003e.  \u003c/p\u003e                                                                                                                     \u003c/div\u003e  \u003c/div\u003e  \u003c/div\u003e                                                                                     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9\",\"path\":\"/drill/equations/equations-activities-9\"},{\"h1\":\"Solutions\",\"path\":\"/drill/equations/equations-solutions\"}],\"key\":\"content/en/drill/08 Equations/16EquationsActivities8.tex\",\"locale\":\"en\",\"metaDescription\":\"Exponents are present in many different equations. Now that you've learned how to work with them, test your knowledge with the following exercises.\",\"htmlContent\":{\"html\":\" \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-374000\\\"\u003e\u003c/a\u003e8.1)\u003c/h3\u003e Solve the equations:  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  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class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\" type=\\\"punct\\\"\u003e.\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e5\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                          \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-375000\\\"\u003e\u003c/a\u003e8.2)\u003c/h3\u003e Solve the equations:  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e                                                                                                                                                                                                                                                \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e9\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e9\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e6\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003c/dl\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-3\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e9\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e9\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e6\u003c/mn\u003e\u003cmsup\u003e\u003cmrow  \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmrow  \u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/msup  \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     You can find the solutions \u003ca href=\\\"/drill/equations/equations-solutions\\\"\u003ehere\u003c/a type=\\\"punct\\\"\u003e. \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     \"},\"image\":null,\"title\":\"Equations Activities 8\",\"previewUrl\":\"https://images.houseofmath.com/eyJrZXkiOiJvdmVybGVhZi1hc3NldHMvcHJldmlldy8xNmVxdWF0aW9uc2FjdGl2aXRpZXM4LnBuZyIsImJ1Y2tldCI6ImhvbS1mcm9udGVuZC1hc3NldHMiLCJ2ZXJzaW9uIjozfQ==\",\"breadcrumbs\":[{\"h1\":\"Pen \u0026 paper exercises\",\"_key\":\"09bac112-9008-5368-8dda-35028d5916a1\",\"path\":\"/drill\"},{\"path\":\"/drill/equations\",\"h1\":\"Equations\",\"_key\":\"0ef35d09-f051-59f2-a098-f18928219db1\"},{\"path\":\"/drill/equations/equations-activities-8\",\"h1\":\"Activities 8\",\"_key\":\"1a919def-8bdd-560b-9e15-29aadb87e6f6\"}]},\"level\":\"16\",\"metaDescription\":\"Exponents are present in many different equations. Now that you've learned how to work with them, test your knowledge with the following exercises.\",\"metaDescriptionActivity\":null,\"activities\":null,\"assets\":null},{\"assets\":null,\"name\":\"Systems of Equations (Graphing)\",\"howContent\":null,\"encyclopediaArticle\":{\"path\":\"/drill/equations/systems-of-equations-graphing\",\"locale\":\"en\",\"metaDescription\":\"A system of equations is a collections of equations. We use three different methods to solve systems of equations that have different variables in them.\",\"previewUrl\":\"https://images.houseofmath.com/eyJrZXkiOiJvdmVybGVhZi1hc3NldHMvcHJldmlldy8xN3N5c3RlbXNvZmVxdWF0aW9ucy5wbmciLCJidWNrZXQiOiJob20tZnJvbnRlbmQtYXNzZXRzIiwidmVyc2lvbiI6M30=\",\"image\":{\"alt\":\"Two linear graphs intersecting at (1,4)\",\"_key\":\"07340298-44eb-53d8-ab1b-adfdf07a7d98\",\"type\":\"textwidth\",\"dimension\":\"width\",\"value\":0.75,\"url\":\"https://images.houseofmath.com/overleaf-assets/images/2likn2ukjente.svg\"},\"key\":\"content/en/drill/08 Equations/17SystemsOfEquations.tex\",\"sharedLanguageKey\":null,\"title\":\"Systems of Equations (Graphing)\",\"type\":\"drill\",\"h1\":\"Systems of Equations (Graphing)\",\"language\":\"en\",\"htmlContent\":{\"html\":\"                                                                                                                                                                                                                                          \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     A \u003cspan  class=\\\"ec-lmri-12x-x-144\\\"\u003esystem of equations \u003c/span\u003eis simply a collection of equations that share a relationship. Here, you’ll learn how to solve two equations with two unknowns—two variables. You’ll learn three methods to solve systems of equations: \u003cspan  class=\\\"ec-lmri-12x-x-144\\\"\u003eGraphing\u003c/span\u003e, the \u003ca href=\\\"/drill/equations/systems-of-equations-substitution\\\"\u003esubstitution method\u003c/a\u003e, and the \u003ca href=\\\"/drill/equations/systems-of-equations-elimination\\\"\u003eelimination method\u003c/a\u003e. Let’s start with graphing. \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch2 class=\\\"section-title\\\"\u003e \u003ca   id=\\\"x1-376000\\\"\u003e\u003c/a\u003eGraphing\u003c/h2\u003e \u003c/p\u003e      \u003cdiv class=\\\"tcolorbox foorule\\\" id=\\\"tcolobox-175\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     Rule\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e\u003ch3 class=\\\"rule-container-title\\\"\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eGraphing\u003c/span\u003e \u003c/h3\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e      \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e    1.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Solve         both         equations         for         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/math\u003e.         This         means         that         you         should         have         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/math\u003e       by         itself         on         one         side         of         both         expressions.         It         looks         something         like         this:         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmi  \u003ea\u003c/mi\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003eb\u003c/mi\u003e\u003c/math type=\\\"punct\\\"\u003e.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     2.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Your         expressions         are         now         \u003ca href=\\\"/drill/functions/linear-functions\\\"\u003elinear         functions\u003c/a\u003e.         Draw         both         of         them         in         the         same         coordinate         system.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     3.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Find         the         point         of         intersection         and         write         down         the         corresponding         values         from         the         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math\u003e-axis         and         the         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/math\u003e-axis.         \u003c/dd\u003e\u003c/dl\u003e                                                                                                                      \u003c/div\u003e  \u003c/div\u003e                                                                                                                           \u003cdiv class=\\\"tcolorbox fooqaexample\\\" id=\\\"tcolobox-176\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e \u003cp class=\\\"indent\\\" \u003e     Example 1\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e\u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eSolve the system of equations\u003c/span\u003e \u003c/p\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align\\\"\u003e                                       \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003c/mtd\u003e                                 \u003cmtd  class=\\\"align-even\\\"\u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                                              \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003cmstyle     id=\\\"x1-376006r1\\\"  class=\\\"label\\\" \u003e\u003c/mstyle\u003e\u003cmstyle  class=\\\"maketag\\\"\u003e\u003cmtext  \u003e(1)\u003c/mtext\u003e\u003c/mstyle\u003e\u003cmspace width=\\\"0.33em\\\" class=\\\"nbsp\\\" /\u003e                                                 \u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003c/mtd\u003e                                \u003cmtd  class=\\\"align-even\\\"\u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                                            \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003cmstyle     id=\\\"x1-376007r2\\\"  class=\\\"label\\\" \u003e\u003c/mstyle\u003e\u003cmstyle  class=\\\"maketag\\\"\u003e\u003cmtext  \u003e(2)\u003c/mtext\u003e\u003c/mstyle\u003e\u003cmspace width=\\\"0.33em\\\" class=\\\"nbsp\\\" /\u003e \u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/b\u003e\u003c/p\u003e                                                                                                                     \u003cdiv class=\\\"lowerbox\\\"\u003e                                                                                                                                                                                                                                           \u003cp class=\\\"noindent\\\" \u003eFirst you solve (\u003ca  href=\\\"#\\\"\u003e1\u003c/a\u003e) with respect to \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/math type=\\\"divide\\\"\u003e: \u003c/p\u003e\u003ctable class=\\\"equation-star\\\"\u003e\u003ctr\u003e\u003ctd\u003e \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" class=\\\"equation\\\"\u003e                                                   \u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003c/math\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/table\u003e \u003cp class=\\\"noindent\\\" \u003eThen you solve (\u003ca  href=\\\"#\\\"\u003e2\u003c/a\u003e) with respect to \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/math type=\\\"divide\\\"\u003e: \u003c/p\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                        \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                       \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                       \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                       \u003cmtd  class=\\\"align-label\\\"\u003e                                        \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e                                              \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmspace width=\\\"1em\\\" class=\\\"quad\\\"/\u003e\u003cmo  class=\\\"MathClass-rel\\\"\u003e|\u003c/mo\u003e\u003cmo  class=\\\"MathClass-bin\\\"\u003e÷\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                       \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                       \u003cmtd  class=\\\"align-label\\\"\u003e                                        \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e                                                \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                       \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e \u003cp class=\\\"noindent\\\" \u003eYou may now plot the lines \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e and \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003c/math type=\\\"divide\\\"\u003e: \u003c/p\u003e \u003cdiv class=\\\"center\\\"  \u003e \u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e\u003cimg src=\\\"https://images.houseofmath.com/overleaf-assets/images/2likn2ukjente.svg\\\" alt=\\\"Two linear graphs intersecting at (1,4)\\\" width=\\\"451\\\" height=\\\"451\\\"\u003e\u003c/p\u003e\u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003eThe point of intersection gives you \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e and \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math type=\\\"punct\\\"\u003e. \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003eANSWER: \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e \u003c/p\u003e                                                                                                                     \u003c/div\u003e  \u003c/div\u003e  \u003c/div\u003e                                                                                                                      \u003cp class=\\\"indent\\\" \u003e     \"},\"isRootPath\":false,\"breadcrumbs\":[{\"_key\":\"09bac112-9008-5368-8dda-35028d5916a1\",\"path\":\"/drill\",\"h1\":\"Pen \u0026 paper exercises\"},{\"path\":\"/drill/equations\",\"h1\":\"Equations\",\"_key\":\"0ef35d09-f051-59f2-a098-f18928219db1\"},{\"h1\":\"Systems of Equations (Graphing)\",\"_key\":\"d14c8983-069d-56b0-95f8-d11fd5794164\",\"path\":\"/drill/equations/systems-of-equations-graphing\"}],\"taskReference\":null,\"cssUrl\":\"/3e26151e-8cd9-466a-907f-43e1e928c4e8-en-0.css\",\"siblings\":[{\"h1\":\"What Is an Equation?\",\"path\":\"/drill/equations/what-is-an-equation\"},{\"h1\":\"Activities 1\",\"path\":\"/drill/equations/equations-activities-1\"},{\"h1\":\"Remove Number in Front of x\",\"path\":\"/drill/equations/remove-number-in-front-of-x\"},{\"h1\":\"Activities 2\",\"path\":\"/drill/equations/equations-activities-2\"},{\"h1\":\"Remove Number Under x\",\"path\":\"/drill/equations/remove-number-under-x\"},{\"h1\":\"Activities 3\",\"path\":\"/drill/equations/equations-activities-3\"},{\"h1\":\"Equations with Several Terms on Both Sides\",\"path\":\"/drill/equations/equations-with-several-terms-on-both-sides\"},{\"h1\":\"Activities 4\",\"path\":\"/drill/equations/equations-activities-4\"},{\"h1\":\"Equations with Fractions and Parentheses\",\"path\":\"/drill/equations/equations-with-fractions-and-parentheses\"},{\"h1\":\"Activities 5\",\"path\":\"/drill/equations/equations-activities-5\"},{\"h1\":\"Equations with x in the Denominator\",\"path\":\"/drill/equations/equations-with-x-in-the-denominator\"},{\"h1\":\"Activities 6\",\"path\":\"/drill/equations/equations-activities-6\"},{\"h1\":\"Checking the Answer\",\"path\":\"/drill/equations/checking-the-answer\"},{\"h1\":\"Activities 7\",\"path\":\"/drill/equations/equations-activities-7\"},{\"h1\":\"How to Solve Power Equations\",\"path\":\"/drill/equations/how-to-solve-power-equations\"},{\"h1\":\"Activities 8\",\"path\":\"/drill/equations/equations-activities-8\"},{\"h1\":\"Systems of Equations (Graphing)\",\"path\":\"/drill/equations/systems-of-equations-graphing\"},{\"h1\":\"Systems of Equations (Substitution)\",\"path\":\"/drill/equations/systems-of-equations-substitution\"},{\"h1\":\"Systems of Equations (Elimination)\",\"path\":\"/drill/equations/systems-of-equations-elimination\"},{\"h1\":\"Activities 9\",\"path\":\"/drill/equations/equations-activities-9\"},{\"h1\":\"Solutions\",\"path\":\"/drill/equations/equations-solutions\"}]},\"level\":\"17\",\"metaDescription\":\"A system of equations is a collections of equations. We use three different methods to solve systems of equations that have different variables in them.\",\"metaDescriptionActivity\":null,\"activities\":null},{\"level\":\"18\",\"metaDescription\":\"The substitution method is another method for solving a system of equations, one of the three methods you need to know to do so efficiently and correctly.\",\"metaDescriptionActivity\":null,\"activities\":null,\"assets\":null,\"name\":\"Systems of Equations (Substitution)\",\"howContent\":null,\"encyclopediaArticle\":{\"type\":\"drill\",\"locale\":\"en\",\"previewUrl\":\"https://images.houseofmath.com/eyJrZXkiOiJvdmVybGVhZi1hc3NldHMvcHJldmlldy8xOHN5c3RlbXNvZmVxdWF0aW9uc3N1Yi5wbmciLCJidWNrZXQiOiJob20tZnJvbnRlbmQtYXNzZXRzIiwidmVyc2lvbiI6M30=\",\"siblings\":[{\"h1\":\"What Is an Equation?\",\"path\":\"/drill/equations/what-is-an-equation\"},{\"h1\":\"Activities 1\",\"path\":\"/drill/equations/equations-activities-1\"},{\"h1\":\"Remove Number in Front of x\",\"path\":\"/drill/equations/remove-number-in-front-of-x\"},{\"h1\":\"Activities 2\",\"path\":\"/drill/equations/equations-activities-2\"},{\"h1\":\"Remove Number Under x\",\"path\":\"/drill/equations/remove-number-under-x\"},{\"h1\":\"Activities 3\",\"path\":\"/drill/equations/equations-activities-3\"},{\"h1\":\"Equations with Several Terms on Both Sides\",\"path\":\"/drill/equations/equations-with-several-terms-on-both-sides\"},{\"h1\":\"Activities 4\",\"path\":\"/drill/equations/equations-activities-4\"},{\"h1\":\"Equations with Fractions and Parentheses\",\"path\":\"/drill/equations/equations-with-fractions-and-parentheses\"},{\"h1\":\"Activities 5\",\"path\":\"/drill/equations/equations-activities-5\"},{\"h1\":\"Equations with x in the Denominator\",\"path\":\"/drill/equations/equations-with-x-in-the-denominator\"},{\"h1\":\"Activities 6\",\"path\":\"/drill/equations/equations-activities-6\"},{\"h1\":\"Checking the Answer\",\"path\":\"/drill/equations/checking-the-answer\"},{\"h1\":\"Activities 7\",\"path\":\"/drill/equations/equations-activities-7\"},{\"h1\":\"How to Solve Power Equations\",\"path\":\"/drill/equations/how-to-solve-power-equations\"},{\"h1\":\"Activities 8\",\"path\":\"/drill/equations/equations-activities-8\"},{\"h1\":\"Systems of Equations (Graphing)\",\"path\":\"/drill/equations/systems-of-equations-graphing\"},{\"h1\":\"Systems of Equations (Substitution)\",\"path\":\"/drill/equations/systems-of-equations-substitution\"},{\"h1\":\"Systems of Equations (Elimination)\",\"path\":\"/drill/equations/systems-of-equations-elimination\"},{\"h1\":\"Activities 9\",\"path\":\"/drill/equations/equations-activities-9\"},{\"h1\":\"Solutions\",\"path\":\"/drill/equations/equations-solutions\"}],\"image\":null,\"key\":\"content/en/drill/08 Equations/18SystemsOfEquationsSub.tex\",\"sharedLanguageKey\":null,\"path\":\"/drill/equations/systems-of-equations-substitution\",\"h1\":\"Systems of Equations (Substitution)\",\"metaDescription\":\"The substitution method is another method for solving a system of equations, one of the three methods you need to know to do so efficiently and correctly.\",\"taskReference\":null,\"title\":\"Systems of Equations (Substitution)\",\"language\":\"en\",\"cssUrl\":\"/3e26151e-8cd9-466a-907f-43e1e928c4e8-en-0.css\",\"htmlContent\":{\"html\":\" \u003c/p\u003e      \u003cdiv class=\\\"tcolorbox foorule\\\" id=\\\"tcolobox-177\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     Rule\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e\u003ch3 class=\\\"rule-container-title\\\"\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eThe\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eSubstitution\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eMethod\u003c/span\u003e \u003c/h3\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e      \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e    1.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Choose         one         equation         and         solve         for         one         of         the         variables.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     2.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Put         the         expression         you         got         in         the         first         step         into         the         equation         you         haven’t         used         yet.         Solve         that         equation.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     3.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Take         this         solution         and         put         it         back         into         the         first         equation.         Solve         it.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     4.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Write         the         answer         as         coordinates:         \u003cp class=\\\"noindent\\\" \u003eANSWER:         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ea\u003c/mi\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e\u003cmi  \u003eb\u003c/mi\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e         \u003c/p\u003e\u003c/dd\u003e\u003c/dl\u003e                                                                                                                      \u003c/div\u003e  \u003c/div\u003e                                                                                                                           \u003cdiv class=\\\"tcolorbox fooqaexample\\\" id=\\\"tcolobox-178\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e \u003cp class=\\\"indent\\\" \u003e     Example 1\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e\u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eSolve the system of equations\u003c/span\u003e \u003c/p\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"alignat-star\\\"\u003e                                   \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                                  \u003cmtd  class=\\\"align-even\\\"\u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003cmspace width=\\\"2em\\\" class=\\\"qquad\\\"/\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                             \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                            \u003cmtd  class=\\\"align-even\\\"\u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmphantom\u003e  \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003c/mphantom\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                  \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                  \u003cmtd  class=\\\"align-label\\\"\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                  \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                  \u003cmtd  class=\\\"align-label\\\"\u003e                                   \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                                  \u003cmtd  class=\\\"align-even\\\"\u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003cmspace width=\\\"2em\\\" class=\\\"qquad\\\"/\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                            \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                            \u003cmtd  class=\\\"align-even\\\"\u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmphantom\u003e  \u003cmn\u003e2\u003c/mn\u003e \u003c/mphantom\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                  \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                  \u003cmtd  class=\\\"align-label\\\"\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                  \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                  \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e \u003cp class=\\\"noindent\\\" \u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eusing the substitution method\u003c/span\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e\u003c/b\u003e\u003c/p\u003e                                                                                               \u003cdiv class=\\\"lowerbox\\\"\u003e                                                                                                                                                                                                                                           \u003cp class=\\\"noindent\\\" \u003e         \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     1.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003eChoose the equation you think looks easier and solve for one of the variables:         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                             \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"1em\\\" class=\\\"quad\\\"/\u003e\u003c/mtd\u003e                                   \u003cmtd  class=\\\"align-even\\\"\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                            \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                            \u003cmtd  class=\\\"align-label\\\"\u003e                                             \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                                              \u003cmtd  class=\\\"align-even\\\"\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmstyle mathcolor=\\\"#E60000\\\"\u003e\u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mstyle\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                   \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                   \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     2.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003eInsert the expression you just found into the equation you haven’t used yet:         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                       \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                      \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                            \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                      \u003cmtd  class=\\\"align-label\\\"\u003e                                       \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmstyle mathcolor=\\\"#E60000\\\"\u003e\u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mstyle\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                              \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                            \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                      \u003cmtd  class=\\\"align-label\\\"\u003e                                       \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                            \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                      \u003cmtd  class=\\\"align-label\\\"\u003e                                       \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                      \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                      \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                      \u003cmtd  class=\\\"align-label\\\"\u003e                                       \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmfrac\u003e\u003cmrow  \u003e\u003cmtext class=\\\"cancel\\\"\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mtext\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e  \u003cmrow  \u003e\u003cmtext class=\\\"cancel\\\"\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mtext\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/mtd\u003e                                                \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmfrac\u003e\u003cmrow  \u003e\u003cmtext class=\\\"cancel\\\"\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mtext\u003e\u003c/mrow\u003e  \u003cmrow  \u003e\u003cmtext class=\\\"cancel\\\"\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mtext\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                          \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                      \u003cmtd  class=\\\"align-label\\\"\u003e                                       \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                          \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmstyle mathcolor=\\\"#E60000\\\"\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mstyle\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                               \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                      \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     3.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003eThen put this value back into the first expression you found:         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                             \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                                            \u003cmtd  class=\\\"align-even\\\"\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                      \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                   \u003cmtd  class=\\\"align-label\\\"\u003e                                    \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                                   \u003cmtd  class=\\\"align-even\\\"\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e⋅\u003c/mo\u003e \u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmstyle mathcolor=\\\"#E60000\\\"\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mstyle\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                            \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                            \u003cmtd  class=\\\"align-label\\\"\u003e                                             \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                                            \u003cmtd  class=\\\"align-even\\\"\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                   \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                            \u003cmtd  class=\\\"align-label\\\"\u003e                                             \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                                            \u003cmtd  class=\\\"align-even\\\"\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                                      \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                            \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     4.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003eWrite the answer as coordinates: \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmstyle  class=\\\"text\\\"\u003e\u003cmtext  \u003eAnswer: \u003c/mtext\u003e\u003c/mstyle\u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e         \u003c/dd\u003e\u003c/dl\u003e                                                                                                                      \u003c/div\u003e  \u003c/div\u003e  \u003c/div\u003e                                                                                                                      \u003cp class=\\\"indent\\\" \u003e     \"},\"breadcrumbs\":[{\"path\":\"/drill\",\"h1\":\"Pen \u0026 paper exercises\",\"_key\":\"09bac112-9008-5368-8dda-35028d5916a1\"},{\"path\":\"/drill/equations\",\"h1\":\"Equations\",\"_key\":\"0ef35d09-f051-59f2-a098-f18928219db1\"},{\"path\":\"/drill/equations/systems-of-equations-substitution\",\"h1\":\"Systems of Equations (Substitution)\",\"_key\":\"dcde91db-f1a6-5c78-92ae-8eedfc7aa0be\"}],\"isRootPath\":false}},{\"encyclopediaArticle\":{\"key\":\"content/en/drill/08 Equations/19SystemsOfEquationsElim.tex\",\"sharedLanguageKey\":null,\"locale\":\"en\",\"cssUrl\":\"/3e26151e-8cd9-466a-907f-43e1e928c4e8-en-0.css\",\"type\":\"drill\",\"language\":\"en\",\"breadcrumbs\":[{\"path\":\"/drill\",\"h1\":\"Pen \u0026 paper exercises\",\"_key\":\"09bac112-9008-5368-8dda-35028d5916a1\"},{\"path\":\"/drill/equations\",\"h1\":\"Equations\",\"_key\":\"0ef35d09-f051-59f2-a098-f18928219db1\"},{\"path\":\"/drill/equations/systems-of-equations-elimination\",\"h1\":\"Systems of Equations (Elimination)\",\"_key\":\"b1e236d8-1c8f-52a4-b031-32cc7066fc85\"}],\"isRootPath\":false,\"path\":\"/drill/equations/systems-of-equations-elimination\",\"title\":\"Systems of Equations (Elimination)\",\"metaDescription\":\"The last method for solving system of equations, the elimination method, uses a set of instructions you can follow. Learn about them in this lesson.\",\"image\":null,\"h1\":\"Systems of Equations (Elimination)\",\"previewUrl\":\"https://images.houseofmath.com/eyJrZXkiOiJvdmVybGVhZi1hc3NldHMvcHJldmlldy8xOXN5c3RlbXNvZmVxdWF0aW9uc2VsaW0ucG5nIiwiYnVja2V0IjoiaG9tLWZyb250ZW5kLWFzc2V0cyIsInZlcnNpb24iOjN9\",\"htmlContent\":{\"html\":\" \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     Here you’ll learn the final method for solving a system of equations, the elimination method. Below are the instructions for how to use this method, followed by an example of solving a system of equations with this method. \u003c/p\u003e      \u003cdiv class=\\\"tcolorbox foorule\\\" id=\\\"tcolobox-179\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     Rule\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e\u003ch3 class=\\\"rule-container-title\\\"\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eThe\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eElimination\u003c/span\u003e \u003cspan  class=\\\"ec-lmbx-12x-x-172\\\"\u003eMethod\u003c/span\u003e \u003c/h3\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e      \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e    1.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Choose         a         variable         that         will         be         eliminated.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     2.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Multiply         the         equations         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003c/math\u003e       and         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003c/math\u003e       by         the         numbers         that         would         make         the         variable         you         chose         have         the         same         coefficient,         but         with         opposite         signs.         This         will         allow         you         to         cancel         them.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     3.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Write         the         new         equations         below         the         first         two.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     4.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Add         equation         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003c/math\u003e       to         equation         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003c/math\u003e,         and         write         the         answer         below         these         equations.         Now,         you’re         left         with         one         equation,         with         one         unknown.         Solve         it.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     5.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Put         the         answer         you         find         into         equation         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003c/math\u003e,         and         solve         for         the         final         variable.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     6.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Write         your         answer         using         coordinates:         \u003cp class=\\\"noindent\\\" \u003eANSWER:         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ea\u003c/mi\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e\u003cmi  \u003eb\u003c/mi\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e         \u003c/p\u003e\u003c/dd\u003e\u003c/dl\u003e                                                                                                                      \u003c/div\u003e  \u003c/div\u003e                                                                                                                           \u003cdiv class=\\\"tcolorbox fooqaexample\\\" id=\\\"tcolobox-180\\\"\u003e     \u003cdiv class=\\\"tcolorbox-title\\\"\u003e \u003cp class=\\\"indent\\\" \u003e     Example 1\u003c/p\u003e\u003c/div\u003e  \u003cdiv class=\\\"tcolorbox-content\\\"\u003e\u003cp class=\\\"noindent\\\" \u003e\u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eSolve the system of equations\u003c/span\u003e \u003c/p\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"alignat-star\\\"\u003e                                    \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                                   \u003cmtd  class=\\\"align-even\\\"\u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003cmspace width=\\\"2em\\\" class=\\\"qquad\\\"/\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                              \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                             \u003cmtd  class=\\\"align-even\\\"\u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                   \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                   \u003cmtd  class=\\\"align-label\\\"\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                   \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                   \u003cmtd  class=\\\"align-label\\\"\u003e                                    \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                                   \u003cmtd  class=\\\"align-even\\\"\u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003cmspace width=\\\"2em\\\" class=\\\"qquad\\\"/\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                             \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003c/mtd\u003e                             \u003cmtd  class=\\\"align-even\\\"\u003e\u003cmstyle mathvariant=\\\"bold-italic\\\"\u003e\u003cmstyle mathvariant=\\\"bold\\\"\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mstyle\u003e\u003c/mstyle\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                   \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                   \u003cmtd  class=\\\"align-label\\\"\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                   \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                   \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/b\u003e\u003c/p\u003e                                                                                               \u003cdiv class=\\\"lowerbox\\\"\u003e                                                                                                                                                                                                                                           \u003cp class=\\\"noindent\\\" \u003e         \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     1.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e         Let’s         decide         to         get         rid         of         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/math type=\\\"punct\\\"\u003e.         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     2.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003eSince you have \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/math\u003e         in equation \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003c/math\u003e and         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/math\u003e in equation         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003c/math\u003e, you have to         multiply equation \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003c/math\u003e         by \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e to         eliminate \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/math\u003e.         In this case, you don’t have to multiply equation         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003c/math\u003e         by anything:         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                    \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"2em\\\" class=\\\"qquad\\\"/\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mtd\u003e                                     \u003cmtd  class=\\\"align-even\\\"\u003e\u003cmspace width=\\\"1em\\\" class=\\\"quad\\\"/\u003e\u003cmo  class=\\\"MathClass-rel\\\"\u003e|\u003c/mo\u003e\u003cmo  class=\\\"MathClass-bin\\\"\u003e⋅\u003c/mo\u003e \u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmstyle mathcolor=\\\"#E60000\\\"\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mstyle\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                   \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                   \u003cmtd  class=\\\"align-label\\\"\u003e                                    \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"2em\\\" class=\\\"qquad\\\"/\u003e\u003cmunder accentunder=\\\"false\\\"  class=\\\"mml-underline\\\"\u003e\u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003cmo  accent=\\\"true\\\"\u003e̲\u003c/mo\u003e\u003c/munder\u003e\u003c/mtd\u003e                                   \u003cmtd  class=\\\"align-even\\\"\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                               \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                   \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     3.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003eWrite the two equations again after applying the changes:         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                            \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmstyle mathcolor=\\\"#E60000\\\"\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mstyle\u003e\u003c/mtd\u003e                                  \u003cmtd  class=\\\"align-even\\\"\u003e\u003cmstyle mathcolor=\\\"#E60000\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mstyle\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                           \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                           \u003cmtd  class=\\\"align-label\\\"\u003e                                            \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmunder accentunder=\\\"false\\\"  class=\\\"mml-underline\\\"\u003e\u003cmrow\u003e \u003cmphantom\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003c/mphantom\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmphantom\u003e  \u003cmn\u003e4\u003c/mn\u003e \u003c/mphantom\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/mrow\u003e\u003cmo  accent=\\\"true\\\"\u003e̲\u003c/mo\u003e\u003c/munder\u003e\u003c/mtd\u003e                                   \u003cmtd  class=\\\"align-even\\\"\u003e\u003cmunder accentunder=\\\"false\\\"  class=\\\"mml-underline\\\"\u003e\u003cmrow\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmphantom\u003e  \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003c/mphantom\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003cmo  accent=\\\"true\\\"\u003e̲\u003c/mo\u003e\u003c/munder\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                           \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                           \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     4.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003eAdd the two equations together such that         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/math\u003e is eliminated,         and solve for \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/math type=\\\"divide\\\"\u003e:         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                   \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                           \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                  \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                  \u003cmtd  class=\\\"align-label\\\"\u003e                                   \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                        \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmphantom\u003e  \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003c/mphantom\u003e \u003cmn\u003e0\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                       \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                  \u003cmtd  class=\\\"align-label\\\"\u003e                                   \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                               \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmphantom\u003e  \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003c/mphantom\u003e \u003cmstyle mathcolor=\\\"#E60000\\\"\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mstyle\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                       \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                  \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     5.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003ePut the answer into either equation \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003c/math\u003e         or \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003c/math\u003e.         Here, you can choose whichever you like. Let’s pick equation         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003c/math\u003e         in this case:         \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"block\\\" \u003e\u003cmtable  columnalign=\\\"left\\\" class=\\\"align-star\\\"\u003e                                             \u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003c/mtd\u003e                                       \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                            \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                            \u003cmtd  class=\\\"align-label\\\"\u003e                                             \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e×\u003c/mo\u003e \u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmstyle mathcolor=\\\"#E60000\\\"\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mstyle\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/mtd\u003e                                            \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                            \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                            \u003cmtd  class=\\\"align-label\\\"\u003e                                             \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ey\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/mtd\u003e                                                   \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                            \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                            \u003cmtd  class=\\\"align-label\\\"\u003e                                             \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003cmtr\u003e\u003cmtd  columnalign=\\\"right\\\" class=\\\"align-odd\\\"\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e                                             \u003cmtd  class=\\\"align-even\\\"\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e                                            \u003cmtd  columnalign=\\\"right\\\" class=\\\"align-label\\\"\u003e\u003c/mtd\u003e                                            \u003cmtd  class=\\\"align-label\\\"\u003e \u003cmspace width=\\\"2em\\\"/\u003e\u003c/mtd\u003e\u003c/mtr\u003e\u003c/mtable\u003e\u003c/math\u003e         \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e     6.  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003eWrite the answer using coordinates:         \u003cp class=\\\"noindent\\\" \u003eANSWER: \u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmi  \u003ex\u003c/mi\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e         \u003c/p\u003e\u003c/dd\u003e\u003c/dl\u003e                                                                                                                      \u003c/div\u003e  \u003c/div\u003e  \u003c/div\u003e                                                                                                                      \u003cp class=\\\"indent\\\" \u003e     \"},\"taskReference\":null,\"siblings\":[{\"h1\":\"What Is an Equation?\",\"path\":\"/drill/equations/what-is-an-equation\"},{\"h1\":\"Activities 1\",\"path\":\"/drill/equations/equations-activities-1\"},{\"h1\":\"Remove Number in Front of x\",\"path\":\"/drill/equations/remove-number-in-front-of-x\"},{\"h1\":\"Activities 2\",\"path\":\"/drill/equations/equations-activities-2\"},{\"h1\":\"Remove Number Under x\",\"path\":\"/drill/equations/remove-number-under-x\"},{\"h1\":\"Activities 3\",\"path\":\"/drill/equations/equations-activities-3\"},{\"h1\":\"Equations with Several Terms on Both Sides\",\"path\":\"/drill/equations/equations-with-several-terms-on-both-sides\"},{\"h1\":\"Activities 4\",\"path\":\"/drill/equations/equations-activities-4\"},{\"h1\":\"Equations with Fractions and Parentheses\",\"path\":\"/drill/equations/equations-with-fractions-and-parentheses\"},{\"h1\":\"Activities 5\",\"path\":\"/drill/equations/equations-activities-5\"},{\"h1\":\"Equations with x in the Denominator\",\"path\":\"/drill/equations/equations-with-x-in-the-denominator\"},{\"h1\":\"Activities 6\",\"path\":\"/drill/equations/equations-activities-6\"},{\"h1\":\"Checking the Answer\",\"path\":\"/drill/equations/checking-the-answer\"},{\"h1\":\"Activities 7\",\"path\":\"/drill/equations/equations-activities-7\"},{\"h1\":\"How to Solve Power Equations\",\"path\":\"/drill/equations/how-to-solve-power-equations\"},{\"h1\":\"Activities 8\",\"path\":\"/drill/equations/equations-activities-8\"},{\"h1\":\"Systems of Equations (Graphing)\",\"path\":\"/drill/equations/systems-of-equations-graphing\"},{\"h1\":\"Systems of Equations (Substitution)\",\"path\":\"/drill/equations/systems-of-equations-substitution\"},{\"h1\":\"Systems of Equations (Elimination)\",\"path\":\"/drill/equations/systems-of-equations-elimination\"},{\"h1\":\"Activities 9\",\"path\":\"/drill/equations/equations-activities-9\"},{\"h1\":\"Solutions\",\"path\":\"/drill/equations/equations-solutions\"}]},\"level\":\"19\",\"metaDescription\":\"The last method for solving system of equations, the elimination method, uses a set of instructions you can follow. Learn about them in this lesson.\",\"metaDescriptionActivity\":null,\"activities\":null,\"assets\":null,\"name\":\"Systems of Equations (Elimination)\",\"howContent\":null},{\"howContent\":null,\"encyclopediaArticle\":{\"key\":\"content/en/drill/08 Equations/20EquationsActivities9.tex\",\"breadcrumbs\":[{\"path\":\"/drill\",\"h1\":\"Pen \u0026 paper exercises\",\"_key\":\"09bac112-9008-5368-8dda-35028d5916a1\"},{\"path\":\"/drill/equations\",\"h1\":\"Equations\",\"_key\":\"0ef35d09-f051-59f2-a098-f18928219db1\"},{\"path\":\"/drill/equations/equations-activities-9\",\"h1\":\"Activities 9\",\"_key\":\"fec96fd6-208c-508a-b0ee-8a7360b07cfe\"}],\"taskReference\":null,\"image\":null,\"metaDescription\":\"These sets of exercises will test you on your knowledge of the three methods of solving systems of equations. Find out if you're a master at this skill!\",\"previewUrl\":\"https://images.houseofmath.com/eyJrZXkiOiJvdmVybGVhZi1hc3NldHMvcHJldmlldy8yMGVxdWF0aW9uc2FjdGl2aXRpZXM5LnBuZyIsImJ1Y2tldCI6ImhvbS1mcm9udGVuZC1hc3NldHMiLCJ2ZXJzaW9uIjozfQ==\",\"htmlContent\":{\"html\":\" \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-377000\\\"\u003e\u003c/a\u003e9.1\u003c/h3\u003e Solve the equations by \u003ca href=\\\"/drill/equations/systems-of-equations-graphing\\\"\u003egraphing\u003c/a type=\\\"divide\\\"\u003e: \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmrow  \u003e\u003cmtable  class=\\\"aligned\\\"\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003c/mtd\u003e \u003c/mtr\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mtd\u003e \u003c/mtr\u003e                                                                                                                   \u003c/mtable\u003e\u003c/mrow\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmrow  \u003e\u003cmtable  class=\\\"aligned\\\"\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e \u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003c/mtd\u003e \u003c/mtr\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mtd\u003e \u003c/mtr\u003e                                                                                                                   \u003c/mtable\u003e\u003c/mrow\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmrow  \u003e\u003cmtable  class=\\\"aligned\\\"\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e \u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003c/mtd\u003e \u003c/mtr\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mtd\u003e \u003c/mtr\u003e                                                                                                                   \u003c/mtable\u003e\u003c/mrow\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmrow  \u003e\u003cmtable  class=\\\"aligned\\\"\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003c/mtd\u003e \u003c/mtr\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e   \u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/mtd\u003e \u003c/mtr\u003e                                                                                                                   \u003c/mtable\u003e\u003c/mrow\u003e\u003c/math\u003e       \u003c/dd\u003e\u003c/dl\u003e \u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-378000\\\"\u003e\u003c/a\u003e9.2)\u003c/h3\u003e Solve the equations with the \u003ca href=\\\"/drill/equations/systems-of-equations-substitution\\\"\u003esubstitution method\u003c/a type=\\\"divide\\\"\u003e: \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmrow  \u003e\u003cmtable  class=\\\"aligned\\\"\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003c/mtd\u003e \u003c/mtr\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mtd\u003e \u003c/mtr\u003e                                                                                                                   \u003c/mtable\u003e\u003c/mrow\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmrow  \u003e\u003cmtable  class=\\\"aligned\\\"\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e  \u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mtd\u003e  \u003cmtd columnalign=\\\"right\\\" \u003e\u003c/mtd\u003e \u003c/mtr\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/mtd\u003e \u003c/mtr\u003e                                                                                                                   \u003c/mtable\u003e\u003c/mrow\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmrow  \u003e\u003cmtable  class=\\\"aligned\\\"\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003c/mtd\u003e \u003c/mtr\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e \u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mtd\u003e \u003c/mtr\u003e                                                                                                                   \u003c/mtable\u003e\u003c/mrow\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmrow  \u003e\u003cmtable  class=\\\"aligned\\\"\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e \u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003c/mtd\u003e \u003c/mtr\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/mtd\u003e \u003c/mtr\u003e                                                                                                                   \u003c/mtable\u003e\u003c/mrow\u003e\u003c/math\u003e       \u003c/dd\u003e\u003c/dl\u003e \u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-379000\\\"\u003e\u003c/a\u003e9.3)\u003c/h3\u003e Solve the equations with the \u003ca href=\\\"/drill/equations/systems-of-equations-elimination\\\"\u003eelimination method\u003c/a type=\\\"divide\\\"\u003e: \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmrow  \u003e\u003cmtable  class=\\\"aligned\\\"\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003c/mtd\u003e \u003c/mtr\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e   \u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mtd\u003e \u003c/mtr\u003e                                                                                                                   \u003c/mtable\u003e\u003c/mrow\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmrow  \u003e\u003cmtable  class=\\\"aligned\\\"\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e   \u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003c/mtd\u003e \u003c/mtr\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mtd\u003e \u003c/mtr\u003e                                                                                                                   \u003c/mtable\u003e\u003c/mrow\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmrow  \u003e\u003cmtable  class=\\\"aligned\\\"\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e \u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mtd\u003e  \u003cmtd columnalign=\\\"right\\\" \u003e\u003c/mtd\u003e \u003c/mtr\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mtd\u003e \u003c/mtr\u003e                                                                                                                   \u003c/mtable\u003e\u003c/mrow\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmrow  \u003e\u003cmtable  class=\\\"aligned\\\"\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e \u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e\u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/mtd\u003e  \u003cmtd columnalign=\\\"right\\\" \u003e\u003c/mtd\u003e \u003c/mtr\u003e\u003cmtr  \u003e\u003cmtd columnalign=\\\"right\\\" \u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmi  \u003eI\u003c/mi\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmspace width=\\\"0.22em\\\" class=\\\"thinspace\\\"/\u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e+\u003c/mo\u003e \u003cmn\u003e9\u003c/mn\u003e\u003cmi  \u003ey\u003c/mi\u003e\u003c/mtd\u003e \u003cmtd columnalign=\\\"left\\\" \u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mtd\u003e \u003c/mtr\u003e                                                                                                                   \u003c/mtable\u003e\u003c/mrow\u003e\u003c/math\u003e       \u003c/dd\u003e\u003c/dl\u003e \u003cp class=\\\"indent\\\" \u003e     You can find the solutions \u003ca href=\\\"/drill/equations/equations-solutions\\\"\u003ehere\u003c/a type=\\\"punct\\\"\u003e. \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e     \"},\"path\":\"/drill/equations/equations-activities-9\",\"title\":\"Equations Activities 9\",\"h1\":\"Activities 9\",\"locale\":\"en\",\"language\":\"en\",\"sharedLanguageKey\":null,\"type\":\"drill\",\"cssUrl\":\"/3e26151e-8cd9-466a-907f-43e1e928c4e8-en-0.css\",\"siblings\":[{\"h1\":\"What Is an Equation?\",\"path\":\"/drill/equations/what-is-an-equation\"},{\"h1\":\"Activities 1\",\"path\":\"/drill/equations/equations-activities-1\"},{\"h1\":\"Remove Number in Front of x\",\"path\":\"/drill/equations/remove-number-in-front-of-x\"},{\"h1\":\"Activities 2\",\"path\":\"/drill/equations/equations-activities-2\"},{\"h1\":\"Remove Number Under x\",\"path\":\"/drill/equations/remove-number-under-x\"},{\"h1\":\"Activities 3\",\"path\":\"/drill/equations/equations-activities-3\"},{\"h1\":\"Equations with Several Terms on Both Sides\",\"path\":\"/drill/equations/equations-with-several-terms-on-both-sides\"},{\"h1\":\"Activities 4\",\"path\":\"/drill/equations/equations-activities-4\"},{\"h1\":\"Equations with Fractions and Parentheses\",\"path\":\"/drill/equations/equations-with-fractions-and-parentheses\"},{\"h1\":\"Activities 5\",\"path\":\"/drill/equations/equations-activities-5\"},{\"h1\":\"Equations with x in the Denominator\",\"path\":\"/drill/equations/equations-with-x-in-the-denominator\"},{\"h1\":\"Activities 6\",\"path\":\"/drill/equations/equations-activities-6\"},{\"h1\":\"Checking the Answer\",\"path\":\"/drill/equations/checking-the-answer\"},{\"h1\":\"Activities 7\",\"path\":\"/drill/equations/equations-activities-7\"},{\"h1\":\"How to Solve Power Equations\",\"path\":\"/drill/equations/how-to-solve-power-equations\"},{\"h1\":\"Activities 8\",\"path\":\"/drill/equations/equations-activities-8\"},{\"h1\":\"Systems of Equations (Graphing)\",\"path\":\"/drill/equations/systems-of-equations-graphing\"},{\"h1\":\"Systems of Equations (Substitution)\",\"path\":\"/drill/equations/systems-of-equations-substitution\"},{\"h1\":\"Systems of Equations (Elimination)\",\"path\":\"/drill/equations/systems-of-equations-elimination\"},{\"h1\":\"Activities 9\",\"path\":\"/drill/equations/equations-activities-9\"},{\"h1\":\"Solutions\",\"path\":\"/drill/equations/equations-solutions\"}],\"isRootPath\":false},\"level\":\"20\",\"metaDescription\":\"These sets of exercises will test you on your knowledge of the three methods of solving systems of equations. Find out if you're a master at this skill!\",\"metaDescriptionActivity\":null,\"activities\":null,\"assets\":null,\"name\":\"Equations Activities 9\"},{\"metaDescriptionActivity\":null,\"activities\":null,\"assets\":null,\"name\":\"Equations Solutions\",\"howContent\":null,\"encyclopediaArticle\":{\"key\":\"content/en/drill/08 Equations/21SolutionsEquations.tex\",\"title\":\"Equations Solutions\",\"metaDescription\":\"Here are all the solution for the equation exercises in this section. Have you become a master of equations? Find out what your results are here!\",\"htmlContent\":{\"html\":\"                                                                                                                                                                                                                                          \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch2 class=\\\"section-title\\\"\u003e \u003ca   id=\\\"x1-380000\\\"\u003e\u003c/a\u003e\u003ca href=\\\"/drill/equations/equations-activities-1\\\"\u003eActivities 1\u003c/a\u003e\u003c/h2\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-381000\\\"\u003e\u003c/a\u003e1.1)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e                                                                                                                                                                                                                                                \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e9\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e8\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ej)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ek)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e8\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003el)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                          \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-4\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e9\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e8\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ej)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ek)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e8\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003el)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e                                                                                                                                                                                                                                          \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-382000\\\"\u003e\u003c/a\u003e1.2)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                          \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-4\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                          \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch2 class=\\\"section-title\\\"\u003e \u003ca   id=\\\"x1-383000\\\"\u003e\u003c/a\u003e\u003ca href=\\\"/drill/equations/equations-activities-2\\\"\u003eActivities 2\u003c/a\u003e\u003c/h2\u003e                                                                                                                                                                                                                                          \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-384000\\\"\u003e\u003c/a\u003e2.1)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                          \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-4\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                          \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-385000\\\"\u003e\u003c/a\u003e2.2)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e\u003cp class=\\\"indent\\\" \u003e                                                                                                                                                                                                                                                \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e9\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003c/dl\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-3\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e  \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e9\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e                                                                                                                                                                                                                                          \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch2 class=\\\"section-title\\\"\u003e \u003ca   id=\\\"x1-386000\\\"\u003e\u003c/a\u003e\u003ca href=\\\"/drill/equations/equations-activities-2\\\"\u003eActivities 3\u003c/a\u003e\u003c/h2\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-387000\\\"\u003e\u003c/a\u003e3.1)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e                                                                                                                                                                                                                                                \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e9\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-3\\\"\u003e \u003cp class=\\\"indent\\\" \u003e                                                                                                                                                                                                                                                \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e9\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e                                                                                                                                                                                                                                          \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-388000\\\"\u003e\u003c/a\u003e3.2)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e8\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e                                                                                                                                                                                                                                               \u003cdiv class=\\\"columns-3\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e8\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     \u003ch2 class=\\\"section-title\\\"\u003e \u003ca   id=\\\"x1-389000\\\"\u003e\u003c/a\u003e\u003ca href=\\\"/drill/equations/equations-activities-4\\\"\u003eActivities 4\u003c/a\u003e\u003c/h2\u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-390000\\\"\u003e\u003c/a\u003e4.1)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e  \u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ej)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e  \u003cmn\u003e8\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-4\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e  \u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ej)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e  \u003cmn\u003e8\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e                                                                                                                                                                                                                                          \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-391000\\\"\u003e\u003c/a\u003e4.2)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e  \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e                                                                                                                                                                                                                                               \u003cdiv class=\\\"columns-3\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e  \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     \u003ch2 class=\\\"section-title\\\"\u003e \u003ca   id=\\\"x1-392000\\\"\u003e\u003c/a\u003e\u003ca href=\\\"/drill/equations/equations-activities-5\\\"\u003eActivities 5\u003c/a\u003e\u003c/h2\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-393000\\\"\u003e\u003c/a\u003e5.1)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e7\u003c/mn\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e8\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e8\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-3\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e7\u003c/mn\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e8\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e8\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e                                                                                                                                                                                                                                          \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-394000\\\"\u003e\u003c/a\u003e5.2)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e                                                                                                                                                                                                                                               \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-4\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch2 class=\\\"section-title\\\"\u003e \u003ca   id=\\\"x1-395000\\\"\u003e\u003c/a\u003e\u003ca href=\\\"/drill/equations/equations-activities-6\\\"\u003eActivities 6\u003c/a\u003e\u003c/h2\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-396000\\\"\u003e\u003c/a\u003e6.1)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-3\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e                                                                                                                                                                                                                                               \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-397000\\\"\u003e\u003c/a\u003e6.2)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e                                                                                                                                                                                                                                               \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-3\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e                                                                                                                                                                                                                                          \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch2 class=\\\"section-title\\\"\u003e \u003ca   id=\\\"x1-398000\\\"\u003e\u003c/a\u003e\u003ca href=\\\"/drill/equations/equations-activities-7\\\"\u003eActivities 7\u003c/a\u003e\u003c/h2\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-399000\\\"\u003e\u003c/a\u003e7.1)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e                                                                                                                                                                                                                                                \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\" type=\\\"punct\\\"\u003e.\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\" type=\\\"punct\\\"\u003e.\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ej)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e9\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ek)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003el)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003em)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003en)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eo)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-4\\\"\u003e \u003cp class=\\\"indent\\\" \u003e                                                                                                                                                                                                                                                \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\" type=\\\"punct\\\"\u003e.\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\" type=\\\"punct\\\"\u003e.\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ej)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e9\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ek)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003el)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003em)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003en)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eo)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e                                                                                                                                                                                                                                          \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-400000\\\"\u003e\u003c/a\u003e7.2)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                          \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-3\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                          \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-401000\\\"\u003e\u003c/a\u003e7.3)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e                                                                                                                                                                                                                                               \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e                                                                                                                                                                                                                                               \u003cdiv class=\\\"columns-4\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e                                                                                                                                                                                                                                          \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-402000\\\"\u003e\u003c/a\u003e7.4)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e  \u003cmn\u003e8\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e  \u003cmn\u003e8\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e                                                                                                                                                                                                                                               \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-4\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e  \u003cmn\u003e8\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e  \u003cmn\u003e8\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-403000\\\"\u003e\u003c/a\u003e7.5)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e  \u003cmn\u003e8\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e  \u003cmn\u003e8\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-4\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e  \u003cmn\u003e8\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e8\u003c/mn\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e  \u003cmn\u003e8\u003c/mn\u003e\u003c/mrow\u003e  \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-404000\\\"\u003e\u003c/a\u003e7.6)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-3\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmn\u003e6\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/mrow\u003e   \u003cmrow\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e \u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmfrac\u003e\u003cmrow\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e1\u003c/mn\u003e\u003c/mrow\u003e \u003cmrow\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/mrow\u003e\u003c/mfrac\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e                                                                                                                                                                                                                                               \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch2 class=\\\"section-title\\\"\u003e \u003ca   id=\\\"x1-405000\\\"\u003e\u003c/a\u003e\u003ca href=\\\"/drill/equations/equations-activities-8\\\"\u003eActivities 8\u003c/a\u003e\u003c/h2\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e                                                                                                                                                                                                                                          \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-406000\\\"\u003e\u003c/a\u003e8.1)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\" type=\\\"punct\\\"\u003e.\u003c/mo\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003eno solution \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-3\\\"\u003e \u003cp class=\\\"indent\\\" \u003e                                                                                                                                                                                                                                                \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e7\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\" type=\\\"punct\\\"\u003e.\u003c/mo\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003eno solution \u003c/dd\u003e\u003c/dl\u003e                                                                                                                                                                                                                                               \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-407000\\\"\u003e\u003c/a\u003e8.2)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e                                                                                                                                                                                                                                           \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003eno solution       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmsqrt\u003e\u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/msqrt\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-3\\\"\u003e \u003cp class=\\\"indent\\\" \u003e                                                                                                                                                                                                                                                \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003eno solution       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmsqrt\u003e\u003cmrow\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/mrow\u003e\u003c/msqrt\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e5\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ee)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e8\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e   \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ef)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e9\u003c/mn\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eg)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eh)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ei)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmi  \u003ex\u003c/mi\u003e \u003cmo  class=\\\"MathClass-rel\\\"\u003e=\u003c/mo\u003e \u003cmo  class=\\\"MathClass-bin\\\"\u003e±\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e                                                                                                                                                                                                                                          \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch2 class=\\\"section-title\\\"\u003e \u003ca   id=\\\"x1-408000\\\"\u003e\u003c/a\u003e\u003ca href=\\\"/drill/equations/equations-activities-9\\\"\u003eActivities 9\u003c/a\u003e\u003c/h2\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-409000\\\"\u003e\u003c/a\u003e9.1)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e                                                                                                                                                                                                                                                \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e4\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e \u003cmn\u003e1\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e                                                                                                                                                                                                       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class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e \u003cmn\u003e3\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e                                                                                                                                                                                                                                          \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-410000\\\"\u003e\u003c/a\u003e9.2)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e6\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e\u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e \u003cmn\u003e9\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e\u003cdiv class=\\\"wide\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-4\\\"\u003e \u003cp class=\\\"indent\\\" \u003e                                                                                                                                                                                                                                                \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e6\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e\u003cmo  class=\\\"MathClass-bin\\\"\u003e−\u003c/mo\u003e\u003cmn\u003e2\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e1\u003c/mn\u003e\u003cmn\u003e0\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e \u003cmn\u003e6\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e \u003cmn\u003e9\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e \u003c/dd\u003e\u003c/dl\u003e      \u003c/div\u003e \u003cp class=\\\"noindent\\\" \u003e\u003c/div\u003e                                                                                                                                                                                                                                          \u003c/p\u003e\u003cp class=\\\"noindent\\\" \u003e \u003c/p\u003e \u003cp class=\\\"indent\\\" \u003e     \u003ch3 class=\\\"subsection-title\\\"\u003e \u003ca   id=\\\"x1-411000\\\"\u003e\u003c/a\u003e9.3)\u003c/h3\u003e  \u003cdiv class=\\\"tight\\\"\u003e \u003c/p\u003e      \u003cdiv class=\\\"columns-2\\\"\u003e \u003cp class=\\\"indent\\\" \u003e       \u003c/p\u003e\u003cdl class=\\\"enumerate-enumitem\\\"\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ea)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e8\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e \u003cmn\u003e5\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e       \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003eb)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e3\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e \u003cmn\u003e2\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e                                                                                                                                                                                                                                                \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e  \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ec)\u003c/span\u003e\u003c/b\u003e  \u003c/dt\u003e\u003cdd  class=\\\"enumerate-enumitem\\\"\u003e\u003cmath mathvariant=\\\"normal\\\"   xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"   display=\\\"inline\\\" \u003e\u003cmo  class=\\\"MathClass-open\\\" stretchy=\\\"false\\\"\u003e(\u003c/mo\u003e\u003cmn\u003e5\u003c/mn\u003e\u003cmo  class=\\\"MathClass-punc\\\"\u003e,\u003c/mo\u003e \u003cmn\u003e4\u003c/mn\u003e\u003cmo  class=\\\"MathClass-close\\\" stretchy=\\\"false\\\"\u003e)\u003c/mo\u003e\u003c/math\u003e \u003c/dd\u003e\u003cdt class=\\\"enumerate-enumitem\\\"\u003e \u003cb\u003e\u003cspan  class=\\\"ec-lmbx-12x-x-144\\\"\u003ed)\u003c/span\u003e\u003c/b\u003e\u003c/dt\u003e\u003cdd  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