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18 February, 07:31

The length of a rectangle is 2 inches less than 3 times the number of inches in its width. If the perimeter of the rectangle is 28 inches, what is the width and length of the rectangle?

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  1. 18 February, 09:02
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    Perimeter = 2L + 2w

    in this case, L = 3w - 2 and perimeter = 28.

    so, 28 = 2L + 2w. or 14 = L + w. or substitute for L: (3w - 2) + w = 14

    or 4w - 2 = 14. 4w = 12. 12/4 = 3 = w.

    The width = 3 inches; and the length = (3x3 - 2) 7 inches.
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