document.write( "Question 709488: \r
\n" ); document.write( "\n" ); document.write( "The length of a rectangle is 3 cm longer than its width.
\n" ); document.write( "If the perimeter of the rectangle is 30 cm, find its area.
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Algebra.Com's Answer #436619 by checkley79(3341)\"\" \"About 
You can put this solution on YOUR website!
L=W+3
\n" ); document.write( "P=2L+2W
\n" ); document.write( "30=2(W+3)+2W
\n" ); document.write( "30=2W+6+2W
\n" ); document.write( "30-6=4W
\n" ); document.write( "24=4W
\n" ); document.write( "24/4=W
\n" ); document.write( "6=W ANS.
\n" ); document.write( "L=6+3=9 ANS.
\n" ); document.write( "PROOF:
\n" ); document.write( "30=2*9+2*6
\n" ); document.write( "30=18+12
\n" ); document.write( "30=30
\n" ); document.write( "AREA=LW
\n" ); document.write( "AREA=6*9=54 cm^2 ANS.
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