document.write( "Question 829279: The length of the rectangle is three times it's width and the perimeter of the rectangle is 80 cm. What is the width of the rectangle ? \n" ); document.write( "

Algebra.Com's Answer #499735 by erica65404(394) $\"\"$ $\"About$

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Start by making an equation for perimeter.
\n" ); document.write( " $\"l%2Bl%2Bw%2Bw=80\"$
\n" ); document.write( "now we know that the length is equal to 3 times the width, l=3w, and that width just equals width, w=w.
\n" ); document.write( "now since i=3w, we can replace all l's with 3w.
\n" ); document.write( " $\"%283w%29%2B%283w%29%2Bw%2Bw=80\"$
\n" ); document.write( " $\"8w=80\"$
\n" ); document.write( " $\"w=10\"$
\n" ); document.write( "since w is the width, the width is 10 cm.
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\n" ); document.write( "Email me at ericahigley@yahoo.com for more free step by step help. \n" ); document.write( "

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