document.write( "Question 1133066: A jeweler has five rings, each weighing 18grams, made of an alloy of 10% silver and 90% gold. He decides to melt down the rings and add enough silver to reduce the gold content to 60%. How much silver should he add? \n" ); document.write( "
Algebra.Com's Answer #750255 by ankor@dixie-net.com(22740)\"\" \"About 
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A jeweler has five rings, each weighing 18 grams, made of an alloy of 10% silver and 90% gold.
\n" ); document.write( " He decides to melt down the rings and add enough silver to reduce the gold content to 60%.
\n" ); document.write( " How much silver should he add?
\n" ); document.write( ":
\n" ); document.write( "60% gold means it will have 40% silver
\n" ); document.write( "total weight of the 5 rings: 5*18 = 90 grams
\n" ); document.write( "let s = amt of silver required
\n" ); document.write( "write an equation base on the percent silver
\n" ); document.write( ".10(90) + s = .40(90+s)
\n" ); document.write( "9 + s = 36 + .40s
\n" ); document.write( "s - .40s = 36 - 9
\n" ); document.write( ".6s = 27
\n" ); document.write( "s = 27/.6
\n" ); document.write( "s = 45 grams of silver required \n" ); document.write( "
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