3X+2Y=m+1......(1) 4X+3Y=m-1 ......(2) (2)-(1): x+y=-2......(3) (3)代入(1) 3X+2Y=x+2(x+y)=x-4=m+1 x=5+m y=-7-m x>y 5+m>-7-m m>-6
