document.write( "Question 75370: the perimeter of a rectangle is 84 cm. the length is twice the width. Find the length and width. \n" ); document.write( "
Algebra.Com's Answer #54073 by checkley75(3666)\"\" \"About 
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2l+2w=perimeter
\n" ); document.write( "2*2w+2w=84
\n" ); document.write( "4w+2w=84
\n" ); document.write( "6w=84
\n" ); document.write( "w=84/6
\n" ); document.write( "w=14 solution for the width.
\n" ); document.write( "2*14=28 for the length.
\n" ); document.write( "proof
\n" ); document.write( "2*28+2*14=84
\n" ); document.write( "56+28=84
\n" ); document.write( "84=84\r
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