algebra
posted by karon .
the speed of a passenger train is 20mph faster than the speed of a freight train. the passenger train travels 300 miles in the same time it takes the freight train to travel 200miles find the speed of each train.

P20=F
timefreight= distance/rate=200/F
timepassenger= 300/P
but 300/P=200/F
200P=300F
200P=300(P20)
solve for P, the speed of the passenger train,then solve for F
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