Решим уравнение:$$2 - 3(7 + 2x) = 11$$$$2 - 21 - 6x = 11$$$$-19 - 6x = 11$$$$-6x = 11 + 19$$$$-6x = 30$$$$x = \frac{30}{-6}$$$$x = -5$$
Ответ: -5