5. Решите уравнение 1-7(4+2x) = -9- 4x.

1 - 7(4 + 2x) = -9 - 4x

1 - 28 - 14x = -9 - 4x

-27 - 14x = -9 - 4x

-27 + 9 = 14x - 4x

-18 = 10x

x = -1.8