two planes leave from the same airport at the same time but travel in opposite directions one flies

题目

two planes leave from the same airport at the same time but travel in opposite directions one flies 60 mi/h faster than the other they are 1820 miles apart after 2 hours how fast is each plane traveling?

答案

有两架飞机从同一个机场出发向相反的方向飞,其中一个飞机的速度比另一架快60英里/h,两小时过后他们相聚1820英里,试问：他们各自的速度是多少?
设一架飞机 的速度为x,则另一个位x+60
2x+2(x+60)=1820
解得x=425
所以一个速度为425 另一个为485