document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1060259>Question 1060259</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A rectangular field, the length twice the width, is enclosed. If the  fence posts were placed 16 ft. apart instead of 12 ft., 66 less posts would be needed.  Determine number of acres in field.\r<BR>\n" );
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document.write( "Area = length * width\r<BR>\n" );
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document.write( "l =  2w\r<BR>\n" );
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document.write( "Not sure how to proceed.  Thanks. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #675330 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><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=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=675330\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> length(l) = 2 * width(w)<BR>\n" );
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document.write( "l = 2w<BR>\n" );
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document.write( "Perimeter = 2(2w) + 2w = 6w<BR>\n" );
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document.write( "we are given two equations<BR>\n" );
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document.write( "1) 6w / 12 = n, where n is number of posts<BR>\n" );
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document.write( "2) 6w / 16 = n - 66<BR>\n" );
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document.write( "substitute 6w / 12 for n in equation 2<BR>\n" );
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document.write( "6w / 16 = (6w / 12) - 66<BR>\n" );
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document.write( "use 48 as common denominator, multiply both sides of = by 48<BR>\n" );
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document.write( "3 * 6w = (4 * 6w) - (66 * 48)<BR>\n" );
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document.write( "18w = 24w - 3168<BR>\n" );
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document.write( "6w = 3168<BR>\n" );
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document.write( "w = 528 feet<BR>\n" );
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document.write( "Area(A) = (528 * 2) * 528 =  557,568 square feet<BR>\n" );
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document.write( "1 Acre = 43,560 square feet<BR>\n" );
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document.write( "A in acres = 557,568 / 42,560 = 13.1008<BR>\n" );
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document.write( "A in acres is approximately 13.1 acres<BR>\n" );
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