document.write( "Question 321481: How many ounces of an alloy containing 30% gold on the world market must be added to 10 ounces of an alloy containing 5% to produce an alloy containing 20% gold? \n" ); document.write( "
Algebra.Com's Answer #230232 by galactus(183)\"\" \"About 
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Let x be the amount of the 30% being added.\r
\n" ); document.write( "\n" ); document.write( "So, we have\r
\n" ); document.write( "\n" ); document.write( ".30x+.05(10)=.20(10+x)\r
\n" ); document.write( "\n" ); document.write( ".30x+.5=2+.20x\r
\n" ); document.write( "\n" ); document.write( ".10x=1.5\r
\n" ); document.write( "\n" ); document.write( "x=1.5/.10=15\r
\n" ); document.write( "\n" ); document.write( "Add 15 ounces of the 30% alloy
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