SOLUTION: A chemist is trying to make 30 gallons of a 42 percent solution. He only has a 50 percent and a 60 percent solution. How much of each are needed?

Question 660106: A chemist is trying to make 30 gallons of a 42 percent solution. He only has a 50 percent and a 60 percent solution. How much of each are needed?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A chemist is trying to make 30 gallons of a 42 percent solution. He only has a 50 percent and a 60 percent solution. How much of each are needed?
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You can only find 10000 examples of this problem on this site.
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f = amount of 50%
s = amount of 60%
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f + s = 30
50f + 60s = 42*(f + s)

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