document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=299705>Question 299705</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Pls. help me solve these problem:<BR>\n" );
document.write( "A grassy plot 25m by 30m is surrounded by a walk of uniform width. If the area of the walk is 300sq. m., how wide is it? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #215264 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=215264\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A grassy plot 25m by 30m is surrounded by a walk of uniform width. If the area of the walk is 300sq. m., how wide is it?<BR>\n" );
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document.write( "\"area of grassy plot AND walk\" minus \"area of grassy plot\" equals 300<BR>\n" );
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document.write( "Let x = width of walk<BR>\n" );
document.write( "then<BR>\n" );
document.write( "(25+2x)(30+2x) - (25)(30) = 300<BR>\n" );
document.write( "(25+2x)(30+2x) - (25)(30) = 300<BR>\n" );
document.write( "750+50x+60x+4x^2 - 750 = 300<BR>\n" );
document.write( "50x+60x+4x^2 = 300<BR>\n" );
document.write( "4x^2+110x = 300<BR>\n" );
document.write( "4x^2+110x-300 = 0<BR>\n" );
document.write( "2x^2+55x-150 = 0<BR>\n" );
document.write( "2x^2+60x-5x-150 = 0<BR>\n" );
document.write( "(2x^2+60x)-(5x+150) = 0<BR>\n" );
document.write( "2x(x+30)-5(x+30) = 0<BR>\n" );
document.write( "(2x-5)(x+30) = 0<BR>\n" );
document.write( "x = {5/2, -30}<BR>\n" );
document.write( "We can throw out the negative answer leaving:<BR>\n" );
document.write( "x = 5/2 = 2.5 meters<BR>\n" );
document.write( " </SPAN>\n" );
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