(x-1)*9=(5-x)*2?????

(х - 1) * 9 = (5 - х) * 2х * 9 - 1 * 9 = 5 * 2 - х * 29х - 9 = 10 - 2х9х + 2х = 10 + 911х = 19х = 19/11х = 1 целая 8/11-------------------------------------------Проверка: (1 8/11 - 1) * 9 = (5 - 1 8/11) * 28/11 * 9 = 3 3/11 * 272/11 = 36/11 * 272/11 = 72/11