(7х-24): 12+26=31 решить уравнение

(7х - 24) : 12 + 26 = 31
(7х - 24) : 12 = 31 - 26
(7х - 24) : 12 = 5
7x - 24 = 12 * 5
7x - 24 = 60
7x = 60 + 24
7x = 84
x = 84 :7
x = 12

проверка   (7* 12 - 24) : 12 + 26 = (84 - 24) : 12 + 26 = 60: 12 +26 = 5 + 26 = 31...   31 = 31