document.write( "Question 828980: A rectangle's width is twice as long as its length. If the perimeter is 36 in, find its length \n" ); document.write( "

Algebra.Com's Answer #499626 by Fombitz(32388) $\"\"$ $\"About$

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Let L be the length and W the width of the re ctangle.
\n" ); document.write( "1. $\"W=2%2AL\"$
\n" ); document.write( "2. $\"2L%2B2W=36\"$
\n" ); document.write( "Substitute eq. 1 into eq. 2,
\n" ); document.write( " $\"2L%2B2%282%2AL%29=36\"$
\n" ); document.write( " $\"2L%2B4L=36\"$
\n" ); document.write( " $\"6L=36\"$
\n" ); document.write( " $\"highlight%28L=9%29\"$
\n" ); document.write( "Then from eq. 1,
\n" ); document.write( " $\"W=2%2AL\"$
\n" ); document.write( " $\"W=2%2A9\"$
\n" ); document.write( " $\"highlight%28W=18%29\"$ \n" ); document.write( "

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