document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=133754>Question 133754</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The Paperback Trader is a book store that takes in used paperbacks for 20% of their cover price and sells them for 50% of their cover price. Pat brings in a stack of 13 paperback books to trade and gets $13.72 credit. Some of the books had a cover price of $5.97, the rest $4.97. She wants to get some Tom Clancy books having a cover price of $5.97. How many $5.97 books did she bring in and how many Clancy books can she get without paying any additional cash?  <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #97876 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=97876\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The Paperback Trader is a book store that takes in used paperbacks for 20% of their cover price and sells them for 50% of their cover price. Pat brings in a stack of 13 paperback books to trade and gets $13.72 credit. Some of the books had a cover price of $5.97, the rest $4.97. She wants to get some Tom Clancy books having a cover price of $5.97. How many $5.97 books did she bring in and how many Clancy books can she get without paying any additional cash? <BR>\n" );
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document.write( "let x = no. of 5.97 books brought in<BR>\n" );
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document.write( "(13-x) = no. of 4.97 books brought in<BR>\n" );
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document.write( "Price of 5.97 books brought in: .2 * 5.97 = $1.194<BR>\n" );
document.write( "Price of 4.97 books brought in: .2 * 4.97 = $.994<BR>\n" );
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document.write( "An equation from this information:<BR>\n" );
document.write( "1.194x + .994(13-x) = 13.72<BR>\n" );
document.write( "1.194x + 12.922 - .994x = 13.72<BR>\n" );
document.write( "1.194 - .994x = 13.72 - 12.922<BR>\n" );
document.write( ".2x = .798<BR>\n" );
document.write( "x = .798/.2<BR>\n" );
document.write( "x = 3.99 ~ 4 ea 5.97 books, she brought in<BR>\n" );
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document.write( "Price of 5.97 books sold: .5 * 5.87 = $2.985<BR>\n" );
document.write( "No of 5.97 books: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=13.72%2F2.985 ALIGN=MIDDLE  ALT=\"13.72%2F2.985\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 4.6 ~ 4 books can be bought without additional $ <BR>\n" );
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