document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=993621>Question 993621</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A jeweler has 5 rings, each weighing 18 grams, made of an alloy of 18% silver and 90% gold. She decides to melt down the rings and added enough silver to reduce the gold content to 75%. How much silver should she add? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #612840 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=612840\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A jeweler has 5 rings, each weighing 18 grams, made of an alloy of 18% silver and 90% gold. She decides to melt down the rings and added enough silver to reduce the gold content to 75%. How much silver should she add? <BR>\n" );
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document.write( "Weight of rings:: 90 grams<BR>\n" );
document.write( "If the result is 75% gold, it must be 25% silver.<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "silver + silver = silver<BR>\n" );
document.write( "18%(weight) silver + 100%(weight) silver = 25%(weight) silver<BR>\n" );
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document.write( "0.18*90 + 1*x = 0.25(90+x)<BR>\n" );
document.write( "Multiply thru by 100 to get::<BR>\n" );
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document.write( "18*90 + 100x = 25*90 + 25x<BR>\n" );
document.write( "Solve for \"x\", which is the amt. of 100% silver you add<BR>\n" );
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document.write( "100x-25x = 25*90-18*90<BR>\n" );
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document.write( "75x = 7*90<BR>\n" );
document.write( "x = (19/15)*7<BR>\n" );
document.write( "x = 8.8667 grams (amt. of 100% silver to add)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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