Odpowiedź:
b)
8 - (4x - 12) = 8x - (3x - 2)
8 - 4x + 12 = 8x - 3x + 2
- 4x + 20 = 5x + 2
- 4x- 5x = 2 - 20
-9x = - 18
9x= 18
x= 18/9 = 2