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document.write( "The length of a rectangle is 3 cm longer than its width.
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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)![]() ![]() ![]() 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. \n" ); document.write( " |