document.write( "Question 956923: the length of a rectangle is three times the width, and the perimeter of the rectangle is 56 inches. what are the length and width of the rectangle? (note: P=2l+2w) \n" ); document.write( "
Algebra.Com's Answer #584659 by checkley77(12844)\"\" \"About 
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L=3W
\n" ); document.write( "56=2(3W)+2W
\n" ); document.write( "56=6W+2W
\n" ); document.write( "56=8W
\n" ); document.write( "W=56/8
\n" ); document.write( "W=7 ANS.
\n" ); document.write( "L=3*7=21 ANS.
\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" );