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)![]() ![]() You can put this solution on YOUR website! 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. \n" ); document.write( "☺☺☺☺ \n" ); document.write( " |