Question

−7x − 2y = −13
x − 2y = 11
use the substitution method to find x and y

Answer 1

x=3

y=−4

Explanation:

Add 2y to both sides of the equation.

x=11+2y

−7x−2y=−13

Replace all occurrences of x with 11+2y in each equation.

−77−16y=−13

x=11+2y

and then you just connect the dots