87-41y=22
41y=87-22
41y=65
y=65/41
Проверка:
87-41*65/41=87-65=22
y=65:41
Проверка:87-41*65:41=87-65=22
22=22
87-41y=22
41y=87-22
41y=65
y=65/41
Проверка:
87-41*65/41=87-65=22
87-41y=22
41y=87-22
41y=65
y=65:41
Проверка:87-41*65:41=87-65=22
22=22