document.write( "Question 1014458: A copper alloy that is 40% copper is to be combined with a copper alloy that is 80% copper to produce 120 kilograms of an alloy that is 70% copper. How many kilograms of each alloy must be used? \n" ); document.write( "
Algebra.Com's Answer #630749 by josgarithmetic(39618)\"\" \"About 
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You can solve using two variables or you can solve using only one variable.\r
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\n" ); document.write( "\n" ); document.write( "lesson for two-part mixture, how much of both parts\r
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\n" ); document.write( "\n" ); document.write( "If you want to use just one variable for two-part mixture
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