a) $$x + 8x + 11 = 146$$
$$9x + 11 = 146$$ $$9x = 146 - 11$$ $$9x = 135$$ $$x = \frac{135}{9}$$ $$x = 15$$Ответ: x = 15
б) $$35x + 22x = 456$$
$$57x = 456$$ $$x = \frac{456}{57}$$ $$x = 8$$Ответ: x = 8
в) $$32y - 27y = 60$$
$$5y = 60$$ $$y = \frac{60}{5}$$ $$y = 12$$Ответ: y = 12
г) $$37z - 2z = 540$$
$$35z = 540$$ $$z = \frac{540}{35}$$ $$z = \frac{108}{7}$$Ответ: $$z = \frac{108}{7}$$