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\"\"\"\"

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The Perimeter of rectangle is \"\".

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According to subtraction property of equality: If a = b then a – c = b - c.

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\"\"                 (Subtract 2w from each side)

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\"\"                              (Additive inverse property: \"\")

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\"\"                                    (Additive inverse property: \"\")

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\"\"                               (Divide each side by 2)

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\"\"                                    (Cancel common terms)

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\"\"

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\"\"

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\"\"                              (Substitute : \"\")

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\"\"                                  (Multiply: \"\")

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\"\"                                          (Subtract: \"\")

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\"\".

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\"\"

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  Length \"\"cm

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\