advanced algebra

ms. driva reck drove from her home to a service station at 48 km/h. she returned home by bike at 16 km/h. the entire trip took 4 hours. How far was the service station from ms. reck's home?

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asked by Sabrina
  1. let the distance be x km
    time driving = x/48
    time biking = x/16

    x/48 + x/16 = 4
    times 48
    x + 3x = 192
    x = 48

    Distance was 48 km

    check: 48/48 + 48/16 = 1+3 = 4

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    posted by Reiny

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