20/29 - (x-12/29) = 5/29
20/29 - x + 12/29 = 5/29
(20 + 12)/29 - x = 5/29
32/29 - x = 5/29
-x = 5/29 - 32/29
-x = -27/29
x = 27/29
Ответ: x = 27/29.
20/29 - (x-12/29) = 5/29
20/29 - x + 12/29 = 5/29
(20 + 12)/29 - x = 5/29
32/29 - x = 5/29
-x = 5/29 - 32/29
-x = -27/29
x = 27/29
Ответ: x = 27/29.