Anastasia , ответ добавлен 19.06.2018 в 13:52

6/7х - 1/2 = 3 : 14
6/7х - 1/2 = 3/14
6/7х = 3/14 + 1/2
6/7х = 3/14 + 7/14
6/7х = 10/14
х = 10/14 : 6/7
х = 10/14 * 7/6
х =5/6 

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