3 11/24 - х = 1 1/6 + 1 1/9
х = 3 11/24 - (1 1/6 + 1 1/9)
х = 3 33/72 - (1 12/72 + 1 8/72)
х = 3 33/72 - 2 20/72
х = 1 13/72
Проверка: 3 33/72 - 1 13/72 = 1 12/72 + 1 8/72
2 20/72 = 2 20/72
ответ: х = 1 13/72.
3 11/24 - х = 1 1/6 + 1 1/9
х = 3 11/24 - (1 1/6 + 1 1/9)
х = 3 33/72 - (1 12/72 + 1 8/72)
х = 3 33/72 - 2 20/72
х = 1 13/72
Проверка: 3 33/72 - 1 13/72 = 1 12/72 + 1 8/72
2 20/72 = 2 20/72
ответ: х = 1 13/72.