Раскроем скобки:
(3x - 2)(2x + 3) - 2x(3x + 1) - 18 = 0
6x^2 + 9x - 4x - 6 - 6x^2 - 2x - 18 = 0
9x - 4x - 2x = 0
3x - 24 = 0
3x = 24
x = 8
Ответ: x = 8.
Раскроем скобки:
(3x - 2)(2x + 3) - 2x(3x + 1) - 18 = 0
6x^2 + 9x - 4x - 6 - 6x^2 - 2x - 18 = 0
9x - 4x - 2x = 0
3x - 24 = 0
3x = 24
x = 8
Ответ: x = 8.