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) $$37z - z = 540$$ $$36z = 540$$ $$z = \frac{540}{36}$$ $$z = 15$$Ответ: z = 15