SOLUTION: How many pounds of a 10% copper alloy must be mixed with 700 lb of a 25% copper alloy to make a 20.5% copper alloy?

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Question 1018378: How many pounds of a 10% copper alloy must be mixed with 700 lb of a 25% copper alloy to make a 20.5% copper alloy?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
How many pounds of a 10% copper alloy must be mixed with 700 lb of a 25% copper alloy to make a 20.5% copper alloy?
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p pounds
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p*10 + 700*25 = (p+700)*20.5