\"\"

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The equation is \"\".

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\"\"              (Evaluate powers: \"\")

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\"\"         (Divide each side by r)

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\"\"                      (Cancel common terms) \"\"

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Check:

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To check, substitute \"\" in equation \"\".

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\"\"         (Substitute \"\")

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\"\"        (Evaluate powers: \"\")

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\"\".             (Multiply: \"\")

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The equation is true.\"\"

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The value of \"\".