Algebra-HELP!!!!

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When Amy drives her car to work, the trip takes 1/2 hour. When she rides the bus, it takes 3/4 hour. The average speed of the bus is 12 mph less than her speed driving. Find the distance she travels to work.

  • Algebra-HELP!!!! -

    Let D be the distance to work.

    D=Drivespeed*1/2

    D=Busspeed*.75

    so Bus*.75=Drivespeed*1/2
    but bus=drivspeed-12

    drivspeed*1/2=(.75)(drivspeed-12)
    solve for drivespeed, then
    distance=drivspeed*1/2

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