(у-8 12/19)+1 17/19=6 2/19
(у-8 12/19)+1 17/19=6 2/19 y- 8 12/19+1 17/19=6 2/19 y= 6 2/19+ 8 12/19- 1 17/19 Y= 14 14/19-1 17/19 Y= 13 33/19-1 17/19 Y= 12 16/19