ВАРИАНТ 12: 25 - 4(3x + 5) = 7(4x + 3)

Question

25 - 12x - 20 = 28x + 21
5 - 12x = 28x + 21
5 - 21 = 28x + 12x
-16 = 40x
x = -16/40 = -2/5

Accepted Answer

25 - 12x - 20 = 28x + 21
5 - 12x = 28x + 21
5 - 21 = 28x + 12x
-16 = 40x
x = -16/40 = -2/5

Ответ: