27x + 15(3-7x) = 3x(13-8) - 12*(36/3)
27x + 15(3-7x) = 3x5 - 121227x + 153 - 15*7x = 15x - 14427x + 45 - 105x = 15x - 144-78x + 45 = 15x - 14445 + 144 = 15x + 78x189 = 93xx = 189 / 93x ≈ 2.03
Ответ: x ≈ 2.03.
27x + 15(3-7x) = 3x(13-8) - 12*(36/3)
27x + 15(3-7x) = 3x5 - 1212
27x + 153 - 15*7x = 15x - 144
27x + 45 - 105x = 15x - 144
-78x + 45 = 15x - 144
45 + 144 = 15x + 78x
189 = 93x
x = 189 / 93
x ≈ 2.03
Ответ: x ≈ 2.03.