document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=63761>Question 63761</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A store is selling CD's for $10.50 and for $8.50. You buy 10 total and spend $93.00. How many of each price did you buy? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #44456 by </B><A HREF=/tutors/aboutme.mpl?userid=Earlsdon><B>Earlsdon(6294)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Earlsdon><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=44456\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x = the number of CDs at $10.50 each, and y = the number of CDs at $8.50 each.<BR>\n" );
document.write( "The total number of CDs is: x + y = 10 Rewrite this as: x = 10 - y and substitute in the equation below:<BR>\n" );
document.write( "The total cost of CDs is: (x)($10.50) + y($8.50) = $93.00\r<BR>\n" );
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document.write( "(10 - y)(10.5) + y(8.5) = 93.  Simplify and solve for y.<BR>\n" );
document.write( "105 - (10.5)y + (8.5)y = 93 Subtract 105 from both sides.<BR>\n" );
document.write( "-10.5y + 8.5y = - 12<BR>\n" );
document.write( "-2y = -12 Divide both sides by -2.<BR>\n" );
document.write( "y = 6<BR>\n" );
document.write( "x = 10 - y<BR>\n" );
document.write( "x = 10 - 6 <BR>\n" );
document.write( "x = 4\r<BR>\n" );
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document.write( "Check:<BR>\n" );
document.write( "4($10.50) + 6($8.50) = $42.00 + $51.00 = $93.00 </SPAN>\n" );
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