document.write( "Question 1092605: How much of an alloy that is 20% copper should be mixed with 300 ounces of an alloy that is 80% copper in order to get an alloy that is 30% ​copper? \n" ); document.write( "
Algebra.Com's Answer #707247 by jorel1380(3719)\"\" \"About 
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Let n be the amount of 20% alloy. Then:
\n" ); document.write( "0.2n+0.8(300)=0.3(300+n)
\n" ); document.write( "0.2n+240=0.3n+90
\n" ); document.write( "0.1n=150
\n" ); document.write( "n=1500 oz.
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