document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=655227>Question 655227</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A man built a walk of uniform width around a rectangular pool. If the area of the walk is 115 square feet and the dimensions of the pool are 15 feet by 3 feet, how wide is the walk?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #409035 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=409035\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A man built a walk of uniform width around a rectangular pool. If the area of the walk is 115 square feet and the dimensions of the pool are 15 feet by 3 feet, how wide is the walk? <BR>\n" );
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document.write( "Area of pool:<BR>\n" );
document.write( "15*3 = 45 square feet<BR>\n" );
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document.write( "Area of pool and walk:<BR>\n" );
document.write( "(x+15)(x+3) = x^2+18x+45<BR>\n" );
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document.write( "\"area of walk\" = \"area of pool and walk\" - \"area of walk\"<BR>\n" );
document.write( "115 = x^2+18x+45 - 45<BR>\n" );
document.write( "115 = x^2+18x<BR>\n" );
document.write( "0 = x^2+18x-115<BR>\n" );
document.write( "0 = (x+23)(x-5)<BR>\n" );
document.write( "x = {-23, 5}<BR>\n" );
document.write( "throw out the negative solution (extraneous) leaving<BR>\n" );
document.write( "x = 5 feet<BR>\n" );
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