document.write( "Question 245618: The length of a rectangle is three times its width. If the perimeter of the rectangle is 56 feet, find its area. \r
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Algebra.Com's Answer #179393 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! L=3W \n" ); document.write( "P=2L+2W \n" ); document.write( "56=2*3W+2W \n" ); document.write( "56=6W+2W \n" ); document.write( "8W=56 \n" ); document.write( "W=56/8 \n" ); document.write( "W=7 ANS. FOR THE WIDTH. \n" ); document.write( "L=3*7=21 ANS. FOR THE LENGTH. \n" ); document.write( "PROOF: \n" ); document.write( "56=2*21+2*7 \n" ); document.write( "56=42+14 \n" ); document.write( "56=56 \n" ); document.write( " \n" ); document.write( " |