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algebra

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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.

  • algebra -

    P-20=F
    timefreight= distance/rate=200/F
    timepassenger= 300/P

    but 300/P=200/F
    200P=300F
    200P=300(P-20)
    solve for P, the speed of the passenger train,then solve for F

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