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24 January, 10:16

A rectangular board has a perimeter of 28 feet. if the length is twice the width minus 1 foot, then what is the length of the board

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  1. 24 January, 11:41
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    P = 2 (L + W)

    P = 28

    L = 2W - 1

    28 = 2 (2W - 1 + W)

    28 = 2 (3W - 1)

    28 = 6W - 2

    28 + 2 = 6W

    30 = 6W

    30/6 = W

    5 = W ... width is 5 ft

    L = 2W - 1

    L = 2 (5) - 1

    L = 10 - 1

    L = 9 < = = = length is 9 ft
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