x+y=101,38 x-y=73,21 101,38+73,21=174,59 2x=174,59 x=87,29 87,29+y=101,38 y=14,09 Succes!

a +b =101.38 a -b =73.21    a =73.21 -b ; inlocuim pe  a  in prima relatie obtinem 73.21 +b +b = 101.38 73.21 +2 b = 101.38 2 b = 101.38 -73.21 2 b =28.17 b =14.085 in  a 2-a relatie inlocuim pe b obtinem a -14.085 =73.21 a =73.21 +14.085  a =87.295 verificam  a + b =101.38 ;87.295 +14.085 =101.38