Решение:

7 - 4(3x - 1) = 5(1 - 2x)

7 - 12x + 4 = 5 - 10x

11 - 12x = 5 - 10x

-12x + 10x = 5 - 11

-2x = -6

x = -6 / -2

x = 3

Ответ: x = 3.