设费用为y元,路程为xkmy=8x x<=3y=24+1.2(x-3) x>3∵y=22.4<24∴22.4=8xx=2.8km乘坐了2.8km
y=8x x<=3y=24+1.2(x-3) x>3∵y=22.4<24∴22.4=8xx=2.8km乘坐了2.8km赞同0|评论
15千米,((22.4-8)÷1.2)+3=15