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Suppose that the length of a rectangle is 3 inches longer than the width and that the perimeter of the rectangle is 78.

Set up an equation involving only W, the width of the rectangle.

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  1. For:
    Assume all values are in inches.
    L=length of rectangle
    W=width of rectangle
    P=perimeter of rectangle
    P=L + W + L + W
    The problem states:
    P=78
    L=W + 3
    Substitute the above values into the perimeter equation.

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