document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=548613>Question 548613</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A rectangular deck for a recreation center is 21 feet long by 20 feet wide. Its area is to be halved by subtracting the same distance x from the length and width. Write and solve an equation to find the  value of x. What are the decks new dimensions? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #357107 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=357107\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Length = 21<BR>\n" );
document.write( "width =20<BR>\n" );
document.write( "area = 420 sq. ft\r<BR>\n" );
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document.write( "half the area = 210 sq.ft\r<BR>\n" );
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document.write( "(21-x)(20-x)=210<BR>\n" );
document.write( "420-21x-20x+x^2=210\r<BR>\n" );
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document.write( "x^2-41x+210=0<BR>\n" );
document.write( "x^2-35x-6x+210=0\r<BR>\n" );
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document.write( "x(x-35)-6(x-35)=0\r<BR>\n" );
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document.write( "(x-35)(x-6)<BR>\n" );
document.write( "x=6 <BR>\n" );
document.write( "14&15 ft </SPAN>\n" );
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