Question

4x - y = -7
-8x + 4y = 12
Elimination

Answer 1

(x,y)=(-2,-1)

Explanation:

4x - y = -7: 8x-2y=-14

8x-2y=-14

-8x + 4y = 12

add these two:

2y=-2

y=-1

plug in the y:

-8x-4=12

-8x=16

x=-2