Mathematics, 22.09.2021 09:50, bommat1085

How much of an alloy that is 30% copper should be mixed with 400 ounces of an alloy that is 90% copper in order to get an alloy that is 50% copper?

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How much of an alloy that is 30% copper should be mixed with 400 ounces of an alloy that is 90% copp...