Algebra

Thomas can do a job in 4 hours. Julia can do the same job in7 hours. How many hours will it take the two of them to do the job it they work together?

asked by BK
  1. 1/4 + 1/7 = 1/x

    Solve for x, the number of hours.

    1/x = 11/28
    x = 28/11 = 2 6/11 hours
    = 2 hours 33 minutes.

    posted by drwls

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