document.write( "Question 846073: How much of an alloy that is 30% copper should be mixed with 400 ounces of an alloy that is 70% copper in order to get an alloy that is 50% copper? \n" ); document.write( "

Algebra.Com's Answer #509636 by Alan3354(69443) $\"\"$ $\"About$

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50% is the average of 30% and 70%, so it's an equal amount.
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