Решить уравнение 90 + х - 40 × 10=60
90 + x - 40 * 10 = 60 x - 310 = 60 x = 310 + 60 x = 370 Проверка 40 * 10 = 400 370 + 90 = 460 460 - 400 = 60
90 + x - 40 * 10 = 60 x = 60 + 400 - 90 x = 370