Question

5 2\7+ 1 3\14-х= 8 2\21

Answer 1

5 2/7 + 1 3/14 - х = 8 2/21

37/7+17/14-х=170/21

74/14+17/14-х=170/21

91/14-х=170/21

13/2-х=170/21

-х=170/21-13/2

-х=340/42-273/42

-х=67/42

х=-67/42

х=-1 25/42