1 - 7(4 + 2x) = -9 - 41 - 28 - 14x = -9 - 4-27 - 14x = -9 - 4-14x + 4x = -9 + 2-10x = 1x = 18 / -1x = -1.8
Ответ: x = -1.8
1 - 7(4 + 2x) = -9 - 4
1 - 28 - 14x = -9 - 4
-27 - 14x = -9 - 4
-14x + 4x = -9 + 2
-10x = 1
x = 18 / -1
x = -1.8
Ответ: x = -1.8