document.write( "Question 141568: Problem: The width of a rectangle is 3 meters less that its lenth. The area is 28 square meters. Find the lenth of the rectangle. \n" ); document.write( "
Algebra.Com's Answer #103179 by nabla(475)\"\" \"About 
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w=L-3
\n" ); document.write( "L=L\r
\n" ); document.write( "\n" ); document.write( "L*w=28\r
\n" ); document.write( "\n" ); document.write( "L(L-3)=28
\n" ); document.write( "L^2-3L=28
\n" ); document.write( "L^2-3L-28=0
\n" ); document.write( "(L-7)(L+4)=0\r
\n" ); document.write( "\n" ); document.write( "leaving L=7 or L=-4
\n" ); document.write( "The only answer that makes sense is L=7.\r
\n" ); document.write( "\n" ); document.write( "Thus, L=7, w=L-3=7-3=4.
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