document.write( "Question 1007274: a metal worker has a 30% copper and another alloy that is 60% copper. how many killograms of each alloy should the metal worker combine to create 80 kg of a 48% copper alloy \n" ); document.write( "
Algebra.Com's Answer #623273 by lwsshak3(11628)\"\" \"About 
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a metal worker has a 30% copper and another alloy that is 60% copper. how many killograms of each alloy should the metal worker combine to create 80 kg of a 48% copper alloy\r
\n" ); document.write( "\n" ); document.write( "let x=amt of 30% alloy to use
\n" ); document.write( "80-x=amt of 60% alloy to use\r
\n" ); document.write( "\n" ); document.write( "30%x+60%(80-x)=48%*80
\n" ); document.write( ".30x+48-.60x=38.4
\n" ); document.write( ".30x=9.6
\n" ); document.write( "x=32
\n" ); document.write( "80-x=48
\n" ); document.write( "amt of 30% alloy to use=32 kg
\n" ); document.write( "amt of 60% alloy to use=48 kg
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