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A pharmacist wishes to mix a solution that is 6% Minocidil. She has on hand 60 ml of a 3% solution and wishes to add some 8% solution to obtain the desired 6% solution. How much 8% solution should she add?

  • math -

    let the amount of the 8% solution she must add be x ml
    .03(60) + .08x = .06(60+x)
    times 100 ....
    3(60) + 8x = 6(60+x)
    180 + 8x = 360 + 6x
    2x = 180
    x = 90

    She should add 90 ml of the stronger solution

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