1.b/a+(11b/5)/(7a/3)=b/a+33b/(35a)=(68/35)*b/a=272/147
解得b/a=20/21 另一个就是272/147-20/21=44/49
2.摩托车x小轿车y
(x+y)/(2x+4y)=2/3
3x+3y=4x+8y
x/y=-5 ?题目错了?
1.b/a+(11b/5)/(7a/3)=b/a+33b/(35a)=(68/35)*b/a=272/147
解得b/a=20/21 另一个就是272/147-20/21=44/49
2.摩托车x小轿车y
(x+y)/(2x+4y)=2/3
3x+3y=4x+8y
x/y=-5 ?题目错了?