Решить уравнение: Х+71 6/13=72
X + 71 6/13 = 72 X = 72 - 71 6/13 X = 71 13/13 - 71 6/13 X = 7/13 —————————- Проверка 7/13 + 71 6/13 = 72 71 13/13 = 72 72 = 72