document.write( "Question 971955: A metal worker has a metal alloy that is 30% copper and another alloy that is 80% copper. How many kilograms of each alloy should the metalworker combine to creat 60 kilograms of a 51% copper alloy? \n" ); document.write( "
Algebra.Com's Answer #594382 by lwsshak3(11628)\"\" \"About 
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A metal worker has a metal alloy that is 30% copper and another alloy that is 80% copper. How many kilograms of each alloy should the metalworker combine to creat 60 kilograms of a 51% copper alloy?
\n" ); document.write( "let x=amt of 30% copper alloy to combine
\n" ); document.write( "60-x=amt of 80% copper alloy to combine
\n" ); document.write( "..
\n" ); document.write( "30%x+80%(60-x)=51%*60
\n" ); document.write( ".30x+40-.80x=30.6
\n" ); document.write( ".50x=9.4
\n" ); document.write( "x=50.6
\n" ); document.write( "How many kilograms of each alloy should the metalworker combine?
\n" ); document.write( "30% copper alloy: 9.4 kg
\n" ); document.write( "80% copper alloy: 50.6 kg
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