document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1154580>Question 1154580</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi\r<BR>\n" );
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document.write( "A bookstore owner bought x pencils for 32 dollars and sold them at a profit of 5 cents per pencil. She ended up with 20 pencils left and received 35 dollars for the sale of the pencils.\r<BR>\n" );
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document.write( "How many pencils did he buy.\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 #777037 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=777037\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A bookstore owner bought x pencils for 32 dollars and sold them at a profit of 5 cents per pencil. She ended up with 20 pencils left and received 35 dollars for the sale of the pencils.\r<BR>\n" );
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document.write( "How many pencils did he buy.\r<BR>\n" );
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document.write( "each pencil costs 32/x dollars\r<BR>\n" );
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document.write( "sold at ((32/x) +0.05) $\r<BR>\n" );
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document.write( "(x-20)((32/x) +0.05)=35\r<BR>\n" );
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document.write( "32-640/x +0.05x -1=35\r<BR>\n" );
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document.write( "-640/x +0.05x =4\r<BR>\n" );
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document.write( "-640 +0.05x^2 =4x\r<BR>\n" );
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document.write( "0.05x^2-4x-640=0\r<BR>\n" );
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document.write( "multiply by 100<BR>\n" );
document.write( "5x^2-400x-64000=0\r<BR>\n" );
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document.write( "x^2-80x -12800=0\r<BR>\n" );
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document.write( "(x+80)(x-160)=0\r<BR>\n" );
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document.write( "x=-80 or x =160\r<BR>\n" );
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document.write( "Number of pencils cannot be negative\r<BR>\n" );
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document.write( "pencils bought =160\r<BR>\n" );
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document.write( " </SPAN>\n" );
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