algebra

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robs tractor is just as fast as lucy's. It takes rob 2 hours more than it takes lucy to drive to town. if rob is 80 miles from town and lucy is 60 miles from town, how long does it take lucy to drive to town?

  • algebra -

    speed = v

    lucy time = 60/v
    rob time = 80/v
    80/v = 2 + 60/v
    20 = 2 v
    v = 10

    lucy time = 60/10 = 6

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