Решите срочно!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Question

Решите срочно!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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Answer 1

3*7/12*7  - 1*4/21*4 = 21/84 - 4/84 = 21-4 / 84 = 17/84

Answer 2

__________17
___
84 ..........