document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=536672>Question 536672</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The area of a rectangular wall in a classroom is 165 square feet. Its length<BR>\n" );
document.write( "is 4 feet longer than its width. Find the width of the wall of the<BR>\n" );
document.write( "classroom. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #352523 by </B><A HREF=/tutors/aboutme.mpl?userid=algebrahouse.com><B>algebrahouse.com(1659)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=algebrahouse.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=algebrahouse.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=352523\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \"The area of a rectangular wall in a classroom is 165 square feet. Its length<BR>\n" );
document.write( "is 4 feet longer than its width. Find the width of the wall of the<BR>\n" );
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document.write( "x = width<BR>\n" );
document.write( "x + 4 = length {the length is 4 longer than the width}\r<BR>\n" );
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document.write( "Area of a rectangle = width x length\r<BR>\n" );
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document.write( "x(x + 4) = 165 {area of a rectangle is width x length}<BR>\n" );
document.write( "x² + 4x = 165 {used distributive property}<BR>\n" );
document.write( "x² + 4x - 165 = 0 {subtracted 165 from both sides}<BR>\n" );
document.write( "(x + 15)(x - 11) = 0 {factored into two binomials}<BR>\n" );
document.write( "x + 15 = 0 or x - 11 = 0 {set each factor equal to 0}<BR>\n" );
document.write( "x = -15 or x = 11 {subtracted 15 and added 11}<BR>\n" );
document.write( "x = 11 {width of a rectangle cannot be negative}\r<BR>\n" );
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document.write( "width = 11 ft<BR>\n" );
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