Linear Equation

An equation in the form: $a_1{x}_1+a_2{x}_2+\cdots +a_n{x}_n=b$ where:

• $a_1,a_2\dots a_n\in \mathbb{R}$
• $x_1,x_2\dots x_n$ are variables
• $b\in R$

An equation is linear if no two variables are multiplied together.