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26 November, 18:45

The width of the rectangle is 5 inches less than it's length, and the area is 84 square inches. what are the length and width of the rectangle?

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  1. 26 November, 19:01
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    W = l - 5 where w = width and l = length

    area = 84 = l*w = l (l-5)

    l (l-5) = 84

    l^2 - 5l - 84 = 0

    (l - 12) (l + 7) = 0

    l = 12

    length = 12 and width = 7
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