75-1,9*(42,8-x)=18 Решите уравнение
-1.9*(42.8 - x) = 18 - 75 -1.9 * (42.8 - x) = -57 1.9 * (42.8 - x) = 57 42.8 - x = 57:1.9 = 3 x = 42.8 - 3 = 39.8 Ответ. 39.8