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OpenStudy (anonymous):
Medal How many kilograms of nickel silver containing 18% zinc and how many kilograms of nickel silver containing 28% zinc must be melted together to produce 713 kg of a new nickel silver containing 21% zinc? Treat the percents given in this exercise as exact numbers, and work to three significant digits ?kg of 18% alloy and ?kg of 28% alloy
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