document.write( "Question 844850: laura and dan use a metal alloy that is 21% copper to make jewelry. how many ounces of a 19% alloy must be mixed with a 25% alloy to form 78 ounces of the desired alloy \n" ); document.write( "
Algebra.Com's Answer #508942 by richwmiller(17219)\"\" \"About 
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.19x+.25y=78*.21,
\n" ); document.write( "x+y=78
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