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2 August, 19:47

A scientist needs 80 liters of a 30% solution of alcohol. She has a 20% solution and a 60% solution available. How many liters of the 20% solution and how many liters of the 60% solution should she mix to make the 30% solution?

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  1. 2 August, 20:20
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    80 times. 30=.20x +.60 (80-x)

    24=.20x+48-.60x

    Subtract 48 from both sides

    -24=-.40x

    Divide both sides by-.40

    X = 60

    60 liters of 20%
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