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7 December, 05:35

a rectangle has a length of 4x and a width of 4x-2. it perimeter i 12 inches. find the length and width

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  1. 7 December, 05:47
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    perimeter (P) = 2 (length + width)

    =2 (4x+4x-2)

    =2 (8x-2) = 16x - 4

    thus 16x-4 = 12 (add 4 to both sides)

    16x = 16 hence x = 1

    length = 4x = 4x1 = 4 inches and width = 4x - 2 = 4-2 = 2 inches
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