document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=160692>Question 160692</A>: <I><SPAN STYLE=\"word-break: break-all;\"> At a sale, all CDs are one price and all tapes are another price.  Three CDs and two tapes cost $72.  One CD and three tapes cost $52.  What are the prices of one CD and one tape?\r<BR>\n" );
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document.write( "So far I've got:\r<BR>\n" );
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document.write( "3c + 2t =72<BR>\n" );
document.write( "c  + 3t =52\r<BR>\n" );
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document.write( "Thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #118481 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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/cgi-bin/show-face.mpl?user=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=118481\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> That's a good start.<BR>\n" );
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document.write( "3c + 2t =72<BR>\n" );
document.write( " c + 3t =52 <BR>\n" );
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document.write( "Now, let's multiply both sides of the bottom equation by -3:<BR>\n" );
document.write( " 3c + 2t =  72<BR>\n" );
document.write( "-3c - 9t =-156 <BR>\n" );
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document.write( "Combine both equations:<BR>\n" );
document.write( " 3c + 2t =  72<BR>\n" );
document.write( "-3c - 9t =-156 <BR>\n" );
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document.write( "     -7t = -84<BR>\n" );
document.write( "       t = 12 (dividing both sides by -7)<BR>\n" );
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document.write( "Using the above, we can plug it into equation 2:<BR>\n" );
document.write( " c + 3t =52 <BR>\n" );
document.write( " c + 3(12) =52 <BR>\n" );
document.write( " c + 36 =52 <BR>\n" );
document.write( "  c = 16<BR>\n" );
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document.write( "Solution:<BR>\n" );
document.write( "tapes: $12<BR>\n" );
document.write( "cd: $16 </SPAN>\n" );
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