8th grade

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Sam Squeeze has 10 quarts of a drink that is 60% organge juice. how much pure orange juice must he add to get a drink that is 75% orange juice?

  • 8th grade -

    At the start there must be 6Q orange and 4Q water.

    Let the total final volume =V
    and the volume of orange added =v

    so at the end

    10Q+v=V..........1

    and

    (6Q+v)/V=0.75 or
    6Q+v=0.75V.......2

    solve the two equations (1 and 2) to find v

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