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OpenStudy (anonymous):
A metalworker has a metal alloy that is 20% copper and another alloy that is 55% copper. How many kilograms of each alloy should the metalworker combine to create 100kg of a 48% copper alloy? The metal worker should use how many kilograms of the metal alloy that is 20% copper and how many kilograms of the metal alloy that is 55% copper?
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