Пошаговое объяснение:
1)
х - 5/12 = 3 7/12
х = 3 7/12 + 5/12
х = 3 12/12
х = 4
2)
х + 5 6/11 = 7
х = 7 - 5 6/11
х = 6 11/11 - 5 6/11
х = 1 5/11
3)
12 - х = 1 13/15
х = 12 - 1 13/15
х = 11 15/15 - 1 13/15
х = 10 2/15
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Пошаговое объяснение:
1)
х - 5/12 = 3 7/12
х = 3 7/12 + 5/12
х = 3 12/12
х = 4
2)
х + 5 6/11 = 7
х = 7 - 5 6/11
х = 6 11/11 - 5 6/11
х = 1 5/11
3)
12 - х = 1 13/15
х = 12 - 1 13/15
х = 11 15/15 - 1 13/15
х = 10 2/15