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March 27, 2017

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The perimeter of a rectangle equals the sum of its lengths of its 4 sides. If the width of a rectangle is 4 inches and its perimeter is 38 inches, find the length of the rectangle.

  • Algebra - ,

    P = Perimeter

    L = Legth

    W = Width



    P = 2 L + 2 W = 2 ( L + W )

    38 = 2 ( L + 4 ) Divide both sides by 2

    19 = L + 4 Subtract 4 to both sides

    19 - 4 = L + 4 - 4

    15 = L

    L = 15 in

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