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A druggist mixes a 10% solution of iodine with a 15% solution of iodine. How much of each solution should be used in order to obtain 20 cubic centimeters of a 12% solution?

  • Math -

    Another algebra problem in two variables. Why are you changing names?

    Please show your work for further assistance.

  • Math -

    I'm not changing names. This is the only one that I posted today. Because this is the only one out of my homework that I don't understand how to do.

  • Math -

    Let X = cc of 10% iodine solution
    Let Y = cc of 15% iodine solution

    X + Y = 20
    (0.1X + 0.15 Y) = 0.12*20

    X + 1.5 Y = 24
    0.5Y = 4

    Take it from there.

  • Math -

    Thanx :)

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