document.write( "Question 71682: The perimeter of a rectangle is 420 inches. The width is 4 inches less than the length. What is the length of the rectangle? \n" ); document.write( "

Algebra.Com's Answer #51261 by ptaylor(2198) $\"\"$ $\"About$

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Let l=length of rectangle
\n" ); document.write( "Then l-4=width\r
\n" ); document.write( "\n" ); document.write( "perimeter=420=2*length+2*width
\n" ); document.write( "420=2l+2(l-4) get rid of parens\r
\n" ); document.write( "\n" ); document.write( "420=2l+2l-8 add 8 to both sides\r
\n" ); document.write( "\n" ); document.write( "420+8=4l+8-8
\n" ); document.write( "428=4l divide both sides by 4
\n" ); document.write( "l=107 in-----------------------------length of rectangle
\n" ); document.write( "l-4=107-4=103 in---------------------------width of rectangle\r
\n" ); document.write( "\n" ); document.write( "CK\r
\n" ); document.write( "\n" ); document.write( "2l+2w=2(107)+2(103)=420
\n" ); document.write( "214+206=420
\n" ); document.write( "420=420\r
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\n" ); document.write( "\n" ); document.write( "Hope this helps---ptaylor\r
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