20/29-(х-12/29)=5/29
Ответ:
х = 27/29
Пошаговое объяснение:
20/29 - ( х - 12/29 ) = 5/29
20/29 - х + 12/29 = 5/29
32/29 - х = 5/29
32/29 - 5/29 = х