27x + 15(3-7x) = 3x(13-8) - 12*(36/3)
27x + 153 - 157x = 3x5 - 1212
27x + 45 - 105x = 15x - 144
-78x + 45 = 15x - 144
-78x - 15x = -144 - 45
-93x = -189
x = -189 / -93
x ≈ 2.0323
Ответ: x ≈ 2.0323.
27x + 15(3-7x) = 3x(13-8) - 12*(36/3)
27x + 153 - 157x = 3x5 - 1212
27x + 45 - 105x = 15x - 144
-78x + 45 = 15x - 144
-78x - 15x = -144 - 45
-93x = -189
x = -189 / -93
x ≈ 2.0323
Ответ: x ≈ 2.0323.