A linear equation in one variable is an equation that can be written in the form 

 Watch this video to learn what that means, and to see examples.

What Is a Linear Equation in One Variable?

Learn about linear equations and how to solve them. Learn to check your answer, to use the change sides, change sign rule, and what to do about parentheses.

A mathematical statement which tells you that two expressions are equal

A linear equation in one variable can be written in the form 

A symbol, often a letter from the alphabet, which represents an unknown value.