Помогите. 40 баллов!!!

Question

Помогите. 40 баллов!!!

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Answer 1

3 - 7/12 = 36/12 - 7/12 = 29/12 = 2 5/12
6 - 4 2/9 = 6 - 38/9 = 54/9 - 38/9 = 16/9 = 1 7/9