Mathematics, 16.12.2020 21:00 XxrazorxX11

21. How many kg of an alloy with 90% copper must be added to 6 kg of another alloy with 15% copper to
obtain an alloy that is 40% copper? (Must show Work)

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21. How many kg of an alloy with 90% copper must be added to 6 kg of another alloy with 15% copper...