\"\"

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The equation is \"\".

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\"\"      (Apply distributive property: \"\")

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\"\"            (Multiply: \"\")

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\"\"

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\"\"                (Multiply: \"\")

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\"\"                       (Divide: \"\")

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Since the expressions on each side of the equation are the same,

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this equation is an identity. It is true for all values of r.\"\"

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The solutions are all numbers.