2 * (2.6x - 4) = -30 + 5.09x
5.2x - 8 = - 30 + 5.09x
5.2x - 5.09x = -30 + 8
0.11x = -22
x = -200
ответ: -200.
2 * (2.6x - 4) = -30 + 5.09x
5.2x - 8 = - 30 + 5.09x
5.2x - 5.09x = -30 + 8
0.11x = -22
x = -200
ответ: -200.