Решите:  1)11/14 - 3/4
2)9 3/4 + 3 1/6
3)7 8/9 - 2 2/3
4)4 1/12 - 1/6
5)5 5/6 - 2 4/7
Решите уравнение:(5 7/9-x)+2 3/4= 3 5/12 
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