1/4(8-8x+12)=7
Multiply both sides by 4 to get rid of the 1/4 fraction:
8 - 8x + 12 = 28
Combine like terms:
-8x +20 = 28
Subtract 20 from both sides:
-8x = 8
Divide both sides by -8:
x = 8/-8
x = -1
