39=9x+7-3x+20
Subtract 27 from each side
12=6x
2=x
Now plug in 2 for x to find AB and BC
9x+7= AB
9(2)+7=AB
18+7= AB
25= AB
-3x+20= BC
-3(2)+20= BC
-6+20= BC
14= BC
The expression foiled together is 6(-3x^2+13xy-4y^2)
X = 28
you divide 112 by 4 to get 28
15/7 is approximately 2.143
