7/12 х - 5/18 = 2 4/9
7/12 х - 5/18 = 22/9
21х - 10 = 88
21х = 88 + 10
21х = 98
х = 14/3
4 2/3
Пошаговое объяснение:
7/12х - 5/18 = 2 4/9
7/12х = 2 4/9 + 5/18
7/12х = 2 8/18 + 5/18
7/12х = 2 13/18
7/12х = 49/18
х = 49/18 : 7/12
х = 49/18 * 12/7
х = 7/3 * 2/1
х = 14/3
х = 4 2/3
