-8x + 4(7 + 8x) = 4x + 7.
-8x + 28 + 32x = 4x + 7
24x + 28 = 4x +7
20x = - 21
x = -1.05
-7x + 9(2 + x) = -4x + 3.
-7x + 18 +9x = -4x +3
2x + 18 = -4x + 3
6x = -15
x= -2.5
-x + 4(7 - x) = -7x + 5
-x + 28 -4x = -7x + 5
-5x + 28 = -7x + 5
2x = -23
x= - 11.5