document.write( "Question 491749: Find the length a d the width of the rectangle described.
\n" ); document.write( "The length is 12 units more than the width. The perimeter is 7 times the width. \n" ); document.write( "

Algebra.Com's Answer #334754 by MathLover1(20849) $\"\"$ $\"About$

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\r
\n" ); document.write( "\n" ); document.write( "The length $\"L\"$ is $\"12\"$ units more than the width $\"W\"$ . \r
\n" ); document.write( "\n" ); document.write( " $\"L=W%2B12\"$ .......1\r
\n" ); document.write( "\n" ); document.write( "The perimeter $\"P\"$ is $\"7\"$ times the width $\"W\"$ .\r
\n" ); document.write( "\n" ); document.write( " $\"P=7W\"$ \r
\n" ); document.write( "\n" ); document.write( "------------------------\r
\n" ); document.write( "\n" ); document.write( " $\"P=2%28L%2BW%29\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"2%28L%2BW%29=7W\"$ ...replace $\"L\"$ with $\"W%2B12\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"2%28W%2B12%2BW%29=7W\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"2%282W%2B12%29=7W\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"4W%2B24=7W\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"24=7W-4W\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"24=3W\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"24%2F3=W\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"highlight%288=W%29\"$ \r
\n" ); document.write( "\n" ); document.write( "now find $\"L\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"L=W%2B12\"$ .......1\r
\n" ); document.write( "\n" ); document.write( " $\"L=8%2B12\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"highlight%28L=20%29\"$ \r
\n" ); document.write( "\n" ); document.write( "check:\r
\n" ); document.write( "\n" ); document.write( " $\"P=2%28L%2BW%29\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"P=2%2820%2B8%29\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"P=2%2828%29\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"P=56\"$ \r
\n" ); document.write( "\n" ); document.write( "and another one\r
\n" ); document.write( "\n" ); document.write( " $\"P=7W\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"P=7%2A8\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"P=56\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );