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A pharmacist mixes 14 ounces of 68% saline solution with 55% saline solution. If the final mixture is 62% saline, how many ounces of the 55% solution were used?

  • math -

    let amount of 55% solution be x ounces
    then amount of 68% solution is 14-x

    solve for x:

    .55x + .68(14-x) = .62(14)
    multiply by 100
    55x+ 68(14-x) = 62(14)

    take over....

  • math -

    55x+68(14-x)=62(14)
    55x+143-68x=868
    55x-68x=725

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