(10 1/7-y): 1 1/7+2 5/8=7 1/8
(10 1/7-y): 1 1/7=7 1/8- 2 5/8
(10 1/7-y): 1 1/7=57/8-21/8
(10 1/7-y): 1 1/7=36/8
(10 1/7-y): 1 1/7=9/2
(10 1/7-y): 1 1/7= 4 1/2
10 1/7-y=4 1/2* 1 1/7
10 1/7-у=9/2* 8/7
10 1/7-у= 72/14
10 1/7-у= 36/7
у= 10 1/7 - 36/7
у= 71/7- 36/7
у=35/7
у=5
