как решить 1целая 7/8X -5=10

1 7/8 * х - 5 = 10, 1 7/8 * х = 10 + 5, 1 7/8 * х = 15, х = 15 : 1 7/8, х = 15 : 15/8, х = 15 * 8/15, х = 8, Проверка : 1 7/8 * 8 - 5 = 10, 15/8 * 8 - 5 = 10, 15 - 5 = 10, 10 = 10