document.write( "Question 1048047: A jeweler has four rings, each weighing 24 g, made of an alloy of 15% silver and 85% gold. She decides to melt down the rings and add enough silver to reduce the gold content to 80%. How much silver should she add? \n" ); document.write( "

Algebra.Com's Answer #663636 by stanbon(75887) $\"\"$ $\"About$

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A jeweler has four rings, each weighing 24 g, made of an alloy of 15% silver and 85% gold. She decides to melt down the rings and add enough silver to reduce the gold content to 80%. How much silver should she add?
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\n" ); document.write( "Equation:
\n" ); document.write( "silver + silver = silver
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\n" ); document.write( "4(0.15*24) + 1*s = 0.20(4*24+s)
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\n" ); document.write( "Multiply thru by 100 to get::
\n" ); document.write( "15*(4*24) + 100s = 20*(4*24) + 20s
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\n" ); document.write( "80s = 5*(4*24)
\n" ); document.write( "s = (1/16)(4*24)
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\n" ); document.write( "s = 6 grams (amt of pure sulver to add)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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