SOLUTION: How much of an alloy that is 40% copper should be mixed with 100 ounces of an alloy that is 60% copper in order to get an alloy that is 50% copper?

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 Question 446499: How much of an alloy that is 40% copper should be mixed with 100 ounces of an alloy that is 60% copper in order to get an alloy that is 50% copper?Answer by ewatrrr(10682)   (Show Source): You can put this solution on YOUR website! ``` Hi, Let x represent how much of an alloy that is 40% copper that is needed: .40x + .60*100 = .50(100+x) .10*100 = .10x .10*100/.10 = x 100 = x CHECKING our Answer*** .40*100 + .60*100 = 40 + 60 = 100 = .50*200 ```