3 8/9-x=1 5/9
x=3 8/9-1 5/9
x=2 3/9
8 25/27-(3 8/27+2 3/27)=8 25/27-5 11/27=3 14/27
(у-8 12/19)+1 7/19=6 2/19
у-8 12/19=6 2/19-1 7/19
у-8 12/19=5 21/19-1 7/19
у-8 12/19=4 14/19
у=4 14/19+8 12/19
у=12 26/19
у=13 7/19
2/9+6/9-3/9=8/9-3/9=5/9
(8 3/17-7 15/17)+3 16/17=(7 20/17-7 15/17)+3 16/17=5/17+3 16/17=
=8 21/17=9 4/17