document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=947519>Question 947519</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A cement walk of uniform width surrounds a rectangular pool that is 10 m wide and 50 m long. Find the width of the walk if its area is 864 mē. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #578163 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39618)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=578163\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> u, the uniform width around the pool<BR>\n" );
document.write( "w, the width of the pool<BR>\n" );
document.write( "L, length of the pool<BR>\n" );
document.write( "A, the area of just the walk area of uniform width u.<BR>\n" );
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document.write( "UNKNOWN:  u<BR>\n" );
document.write( "KNOWN:  w=10, L=50, A=864\r<BR>\n" );
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document.write( "Note: sometimes, variables can be assigned differently, mostly depending on the person analyzing the problem.\r<BR>\n" );
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document.write( "Draw the picture  (not shown here).\r<BR>\n" );
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document.write( "Total Area pool and walkway:  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28w%2B2u%29%28L%2B2u%29 ALIGN=MIDDLE  ALT=\"%28w%2B2u%29%28L%2B2u%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Walkway Area only:  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28w%2B2u%29%28L%2B2u%29-wL ALIGN=MIDDLE  ALT=\"%28w%2B2u%29%28L%2B2u%29-wL\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Walkway Area IS known:  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28%28w%2B2u%29%28L%2B2u%29-wL=A%29 ALIGN=MIDDLE  ALT=\"highlight_green%28%28w%2B2u%29%28L%2B2u%29-wL=A%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "The green-highlighted equation, purely in symbolic form can be simplified and is a quadratic equation in the unknown variable, u.   The rest is up to you to continue. </SPAN>\n" );
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