144 - (х : 11 + 21) * 5 = 14 (х : 11 + 21 ) * 5 = 144 - 14 (х :11 + 21) * 5 = 130 х : 11 + 21 = 130 : 5 х : 11 + 21 = 26 x : 11 = 26 - 21 x : 11 =5 x = 5 * 11 x = 55 Проверка: 144 - (55 : 11 + 21) * 5 = 144 - (5 + 21) * 5 = 144 - 26 * 5 = 144 - 130 = 14.... 14 = 14