Posted by **Dana** on Saturday, May 11, 2013 at 10:31am.

Suppose the width of a rectangle is 5 inches shorter than the length and that the perimeter of the rectangle is 80 inches. The formula for the perimeter of a rectangle is P=2L + 2W. Set up an equation for the perimeter involving only the L the length of the rectancle.

And solve this linear eqation algebracially to find the length of the rectangle and find the length as well

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