document.write( "Question 489833: For my assignment: Suppose that the length of a rectangle is three cm longer than twice the width and that the perimeter of the rectangle is 90.
\n" ); document.write( "1. set up an equation for the perimeter involving only W, the width of the rectangle.
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Algebra.Com's Answer #333783 by htmentor(1343)\"\" \"About 
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For my assignment: Suppose that the length of a rectangle is three cm longer than twice the width and that the perimeter of the rectangle is 90.
\n" ); document.write( "1. set up an equation for the perimeter involving only W, the width of the rectangle.
\n" ); document.write( "================================
\n" ); document.write( "Let l = the length, w = the width
\n" ); document.write( "Given:
\n" ); document.write( "length is 3 cm MORE than TWICE the width
\n" ); document.write( "l = 3 + 2w
\n" ); document.write( "perimeter is 90.
\n" ); document.write( "2l + 2w = 90
\n" ); document.write( "Substitute the value for l from the 1st equation into the 2nd:
\n" ); document.write( "2(3+2w) + 2w = 90
\n" ); document.write( "Simplify:
\n" ); document.write( "6 + 4w + 2w = 90
\n" ); document.write( "6w = 84
\n" ); document.write( "w = 14
\n" ); document.write( "
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