milan175

Verified answer

2 5/6 -(-у+7)=-8 1/2
17/6+у-7=- 17/2
17/6 -7= (17-42)/6=- 25/6
- 25/6+у=- 17/2
у=- 17/2+ 25/6
25/6 - 17/2=(25-17·3)/6=(25-51)/6=- 26/6
у=- 26/6
у= - 4 2/6
у=-4 1/3