6x = 72x = 72 / 6x = 12
51 - 3(2x - 4) = 2751 - 6x + 12 = 2763 - 6x = 27-6x = -36x = 6
Ответ: x = 12, x = 6
6x = 72
x = 72 / 6
x = 12
51 - 3(2x - 4) = 27
51 - 6x + 12 = 27
63 - 6x = 27
-6x = -36
x = 6
Ответ: x = 12, x = 6