Answer:
x=0 and y=−8
Explanation:
4x+4y=−32 
4x−4y=32 
Add these equations to eliminate y: 
8x=0 
Then solve 8x=0 for x: 
8x=0 
(Divide both sides by 8 to get x by itself)
x=0 
 
Now we plug x back in to solve for y. 
4x+4y=−32 
Substitute 0 for x 
(4)(0)+4y=−32 
4y=−32 (Simplify both sides of the equation) 
(Divide both sides by 4 to get y by itself)
y=−8