# Linear Equations

A linear equation is one where all the variables (unknowns) are only raised to the first power.

$x+1=10\;\quad\text{is\;a\;linear\;equation}$

$x^{2}+1=10\quad\quad\text{is\;not\;a\;linear\;equation}$

Linear equations can also have multiple variables, like: $x-2y=8$.

Algebra questions on the COMPASS Test cover linear equations in both one and two variables. We’ll cover these cases in two separate lessons.