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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
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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