document.write( "Question 751163: how much of an alloy that is 20% copper should be mixed with 500 ounces of an alloy that is 60% copper in order to get an alloy that is 30% copper
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Algebra.Com's Answer #457025 by tommyt3rd(5050)\"\" \"About 
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how much of an alloy that is 20% copper: 0.20x
\n" ); document.write( "should be mixed with 500 ounces of an alloy that is 60% copper: 500(0.60)=300
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\n" ); document.write( "an alloy that is 30% copper: (x+500)(0.30)\r
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\n" ); document.write( "\n" ); document.write( "putting them together:\r
\n" ); document.write( "\n" ); document.write( "0.2x+300=(x+500)(0.30)\r
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\n" ); document.write( "\n" ); document.write( "which gives us x=1500 ounces\r
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