document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=340288>Question 340288</A>: <I><SPAN STYLE=\"word-break: break-all;\"> This equation has me stumped. It has been a while since I have had Algebra and cant remember all the formula's.\r<BR>\n" );
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document.write( "A cement walk of uniform width is built around a 20 foot by 40 foot rectangle pool and the area of the walk is 700 square feet. How wide will the walk be? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #243811 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=243811\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let width of walk be x feet<BR>\n" );
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document.write( "Area of pool = 40*20 = 800 sq.ft.<BR>\n" );
document.write( "Length of pool + walk = 40+2x . ( x on both sides so 2x)<BR>\n" );
document.write( "width of pool + walk = 20+2x<BR>\n" );
document.write( "Area of pool + walk = (40+2x)(20+2x)<BR>\n" );
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document.write( "Area of pool + walk less area of pool = area of walk<BR>\n" );
document.write( "(40+2x)(20+2x)-800=700<BR>\n" );
document.write( "800+80x+40x+4x^2-800 =700<BR>\n" );
document.write( "4x^2+120x-700=0<BR>\n" );
document.write( "divide by 4<BR>\n" );
document.write( "x^2+30x-175 =0<BR>\n" );
document.write( "X^2+35X-5X-175=0<BR>\n" );
document.write( "X(X+35)-5(X+35)=0<BR>\n" );
document.write( "(X+35)(X-5)=0<BR>\n" );
document.write( "X=5 or -35<BR>\n" );
document.write( "iGNORE NEGATIVE VALUE.<BR>\n" );
document.write( "SO X = 5 FEET THE WIDTH </SPAN>\n" );
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