Question

System A
-x-4y-8=0
x-4y=8

Answer 1

y=-2 x=0

Solve for x on the top equation
-x=4y+8
x=-4y-8
Then plug it in and solve for y on the second equation
-4y-8-4y=8
-8y=16
y=-2
Then plug y into the second equation to solve for x
x-4(-2)=8
x+8=8
x=0