1,
x+y/2+x-y/3=6即：5x-y=36 ①
4(x+y)-5(x-y)=2 即:-x+9y=2 ②
①+②*5==可接
2,先化整：3（x+y）+2（x-y）=36①
4(x+y)-5(x-y)=2②
①*5+②*2可解