Question

Use elimination to solve x + 4y =  -8 and x - 4y = -8

Answer 1

x=-8

y=0

Explanation:

x+4y=-8

x-4y=-8

2x=-16

2

x=-8

-8+4y=-8

+8 +8

4y=0

4

y=0

Answer 2

Add them to get 2x=-16, x=-8, substitute in either to get 4y=0, y=0.