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A metalworker has a metal alloy that is 25​% copper and another alloy that is 65​% copper. How many kilograms of each alloy should the metalworker combine to create 120 kg of a 49​% copper​ alloy? The metalworker should use nothing kilograms of the metal alloy that is 25​% copper and nothing kilograms of the metal alloy that is 65​% copper.

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Answer:

48kg

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