х-1 15/16)+7 3/16=8 1/16+4 9/16;

15 3/28-(4 11/28+у)=7-1 9/28

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1)(x-1 15/16)+7 3/16=8 1/16+4 9/16

(x-1 15/16)+7 3/16=12 10/16

(x-1 15/16)=12 10/16-7 3/16

(х- 1 15/16)=5 7/16

х=5 7/16+1 15/16

х=6 22/16

х=7 6/16

х=7 3/8

ответ. х= 7 3/8

2)15 3/28-(4 11/28+у)=5 19/28

4 11/28+у=15 3/28-5 19/28

4 11/28+у=14 31/28-5 19/28

4 11/28+у=9 12/28

у=9 12/28-4 11/28

у=5 1/28