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OpenStudy (anonymous):
CAN SOMEONE PLEASE HELP ME how much of an alloy that is 30% copper should be mixed with 400 ounces of an alloy that is 60% copper in order to get an alloy that is 40% copper?
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OpenStudy (welshfella):
work in mass of copper let the mass of the 30% alloy be x so we have 0.30x + (0.60)* 400 = 0.40(x + 400) solve for x
OpenStudy (anonymous):
800?
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