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QUESTION
How much of an alloy tht is 20% copper should be mixed with 300 ounces of an alloy that is 90% copper in order to get an alloy that is 40% copper?
How much of an alloy tht is 20% copper should be mixed with 300 ounces of an alloy that is 90% copper in order to get an alloy that is 40% copper?
