document.write( "Question 285342: The formula for the perimeter of a rectangle is P=2L+2w, where L is the length and w is the width. A rectangle has a perimeter of 24 inches. Find its dimensions if its length is 3 inches greater than its width. \n" ); document.write( "
Algebra.Com's Answer #206844 by checkley77(12844)\"\" \"About 
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L=W+3
\n" ); document.write( "PERIMETER=2L+2W
\n" ); document.write( "24=2(W+3)+2W
\n" ); document.write( "24=2W+6+2W
\n" ); document.write( "24=4W+6
\n" ); document.write( "4W=24-6
\n" ); document.write( "4W=18
\n" ); document.write( "W=18/4
\n" ); document.write( "W=4.5 ANS. FOR THE WIDTH.
\n" ); document.write( "L=4.5+3=7.5 ANS. FOR THE LENGTH.
\n" ); document.write( "PROOF:
\n" ); document.write( "24=2*7.5+2*4.5
\n" ); document.write( "24=15+9
\n" ); document.write( "24=24
\n" ); document.write( "
\n" );