解:设X天后(0.08+0.07)X+0.17=1.22 0.15X=1.22-0.17 X=1.05÷0.15 X=7
设x天后两队还相距0.17千米0.08x+0.07x+0.17=1.220.15x=1.22-0.170.15x=1.05x=1.05÷0.15x=7∴7天后两队还相距0.17千米
1.22~(0.08X+0.07x)=0.17