Question

Решите уравнение: 4(3 – х) – 15 = 7(2х – 3).

Answer 1

$4(3 - x) - 15 = 7(2x - 3) \\ 12 - 4x - 15 = 14x - 21 \\ - 3 - 4x = 14x - 21 \\ - 4x - 14x = - 21 + 3 \\ - 18x = - 18 \\ x = - 18 \div ( - 18) \\ x = 1$