Пошаговое объяснение:
17 9/28 - 12 1/14=5 8/14
___________________
5 8/14+ 12 1/14 = 17 9/28
5 8/14 = 5 4/7
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Пошаговое объяснение:
17 9/28 - 12 1/14=5 8/14
___________________
5 8/14+ 12 1/14 = 17 9/28
5 8/14 = 5 4/7