解:( X+Y)/2+(X-Y)/3=6 ①4(X+Y)-5(X-Y)=2 ②由①×8得:4(X+Y)+8(X-Y)/3=48 ③由③-②得:23(X-Y)/3=46 X-Y=6 ④把X-Y=6代入②得:4(X+Y)-5×6=2 X+Y=8 ⑤由④+⑤得:2X=14 X=7把X=7代入④得:7-Y=6 Y=1所以方程组的根为X=7 Y=1