2. Решите уравнение 9x – 6 (x - 1) = 5 (x + 2).
9x - 6x + 6 = 5x + 10
3x + 6 = 5x + 10
3x - 5x = 10 - 6
-2x = 4
x = -2
Ответ: x = -2