1 - 7(4 + 2x) = -9 - 4x1 - 28 - 14x = -9 - 4x-27 - 14x = -9 - 4x-14x + 4x = -9 + 27-10x = 18x = 18 / -10x = -1.8
Ответ: x = -1.8
1 - 7(4 + 2x) = -9 - 4x
1 - 28 - 14x = -9 - 4x
-27 - 14x = -9 - 4x
-14x + 4x = -9 + 27
-10x = 18
x = 18 / -10
x = -1.8
Ответ: x = -1.8