Tìm x

a) |2x + 1| - 19 = -7

b) -28 – 7. |- 3x + 15| = -70

c) |18 – 2. |-x + 5|| = 12

d) 12 – 2.(-x + 3)2 = - 38

e) -20 + 3.(2x + 1)3 = -101