document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=862908>Question 862908</A>: <I><SPAN STYLE=\"word-break: break-all;\"> You will purchase some CDs and DVDs. If you purchase 11 CDs and 9 DVDs, it will cost you $85.35; if you purchase 9 CDs and 11 DVDs, it will cost you $95.65.  Solve for how much a CD and a DVD cost. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #520052 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=520052\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You will purchase some CDs and DVDs. If you purchase 11 CDs and 9 DVDs, it will cost you $85.35; if you purchase 9 CDs and 11 DVDs, it will cost you $95.65. Solve for how much a CD and a DVD cost.<BR>\n" );
document.write( "***<BR>\n" );
document.write( "let x=cost of each CD<BR>\n" );
document.write( "let y=cost of each DVD<BR>\n" );
document.write( "..<BR>\n" );
document.write( "11x+9y=85.35<BR>\n" );
document.write( "9x+11y=95.65<BR>\n" );
document.write( "..<BR>\n" );
document.write( "99x+81y=768.15(mult. eq1 by 9)<BR>\n" );
document.write( "99x+121y=1052.15(mult. eq2 by 11)<BR>\n" );
document.write( "subtract to eliminate x<BR>\n" );
document.write( "-40y=-284<BR>\n" );
document.write( "y=7.10 <BR>\n" );
document.write( "..<BR>\n" );
document.write( "9x=95.65-11y=17.55<BR>\n" );
document.write( "x=1.95<BR>\n" );
document.write( "cost of each CD=$1.95<BR>\n" );
document.write( "cost of each DVD=$7.10<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );