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Mathematics, 20.07.2019 16:00 Jennitiu

An alloy of copper is 10% copper and weighs 25 pounds. a second alloy is 18% copper. how much (to the nearest lb.) of the second alloy must be added to the first alloy to get a 13% mixture.

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An alloy of copper is 10% copper and weighs 25 pounds. a second alloy is 18% copper. how much (to th...
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