Question

How do you decide which variable to isolate in order to

use the substitution method to solve a system of linear
equations?
Intro

Answer 1

Explanation:

it depends on the vaiable you choose to cancel out first. For example, if I had two equations:

-12x+9y=7

9x-12y=6

if you wanted first eliminate the x values, then you distribute a certain number to either equation that will cause the x values to cancel (one being negative, and the other being positive)