设甲为x,乙为yx+y=170x\9=y\8结果：y=80,x=90
甲数=170*（9/17）=90乙数=170-90=80
1/9x=1/8y x+y=170 x=9/8y 9/8y+y=170 17/8y=170 y=80 x=90
