6 1/7- (c+2 4/7)=2 5/7 3 5/16+(d-1 7/16)=9 1/16 (7 1/8-х)+2 3/8=5 7/8 14 7/9- (у +8 8/9)=4 2/9

6 1/7-с-2 4/7=2 5/7 7 1/8-х +2 3/8=5 7/8-с=2 5/7-6 1/7+2 4/7 — х=5 7/8-7 1/8-2 3/8 — с=-3 3/7+2 4/7 — х=-10/8-2 3/8-с=-6/7 — х=-29/8 c=6/7 х=3 5/8 3 5/16+ д-1 7/16=9 1/16 14 7/9-у-8 8/9=4 2/9 д=9 1/16-3 5/16+1 7/16 — у=4 2/9-14 7/9+8 8/9 д=5 12/16+1 7/16 — у=-1 2/3 д=7 3/16 у=1 2/3