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 #509615 by richwmiller(17219) $\"\"$ $\"About$

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.3x+.7*400=.5*(300+x)
\n" ); document.write( "x=650 \n" ); document.write( "

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