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A contractor is calculating the interior perimeter of square windows on a building site. Each window will be framed with 2 inches of wood within a concrete frame. The length or width of each window can be shown by the expression x − 2. The contractor writes this expression to find the interior perimeter of a window: (x − 2) + (x − 2) + (x − 2) + (x − 2). What equivalent expression can you use to find the same measurement?

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(x - 2) + (x - 2) + (x - 2) + (x - 2)=\\4(x-2)\: \: or \: \: 2(x-2)+2(x-2)

User Elliott Frisch
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