document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=460436>Question 460436</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Sam has 5 rings each weighing 18g, 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 75%.   How much silver should he add? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #315818 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=315818\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Sam has 5 rings each weighing 18g, 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 75%. How much silver should he add?<BR>\n" );
document.write( "..<BR>\n" );
document.write( "let x=grams of silver to add<BR>\n" );
document.write( "18*10%=1.8g = initial grams of silver in alloy<BR>\n" );
document.write( "18*90%=16.2g=initial grams of gold in alloy<BR>\n" );
document.write( "1.8+x=total grams of silver in new alloy<BR>\n" );
document.write( "..<BR>\n" );
document.write( "ratio of silver to gold in new alloy=25/75=1/3=(1.8+x)/(16.2)<BR>\n" );
document.write( "3(1.8+x)=16.2<BR>\n" );
document.write( "5.4+3x=16.2<BR>\n" );
document.write( "3x=16.2-5.4=10.8<BR>\n" );
document.write( "x=10.8/3=3.6 g<BR>\n" );
document.write( "ans:<BR>\n" );
document.write( "The amount of silver to add to reduce the gold content to 75%=3.6g </SPAN>\n" );
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