х-2,8=-1,6
4 5/12+у=-5 3/20
3,2-х=-5,1
у+ 3 3/14=-1 4/21

х-2,8=-1,6Х=-1,6+2,8Х=1,24 5/12+у=-5 3/20У=-5 3/20-4 5/12У=-9 9/60-25/60=-9 34/60=-9 17/303,2-х=-5,1-х=-5,1-3,2Х=8,3у+ 3 3/14=-1 4/21У=-1 4/21-3 3/14У=-4 8/42-9/42У=-4 17/42