Пошаговое объяснение:
(9-4х)+(8х-1)=(6х-9)-(6х+3)
9 - 4x + 8x - 1 = 6x - 9 - 6x - 3
4x + 8 = -12
4x = -12 - 8
4x = -20
x = -20 : 4
x = -5
