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)\"\" \"About 
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
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