16x + 64
Hope this helps:)
-2(8m+8) = -16
-16m - 16 = -16
His first mistake lies in his distribution. When multiplying -2 * 8, he made it a positive 16, when he should have made it a negative 16.
-16m - 16 = -16
Add 16 to each side.
-16m = 0
Divide that by -16
m = 0
I'm pretty sure it would be d. you have to add the xs and ys and divide each by 2.