\"\"\"\"

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The equation is\"\"

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\"\"         (Distributive property: \"\")

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\"\"               (Multiply: \"\")

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

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

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Left and right side of equation is equals.

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Here the value of r is all set of real numbers.\"\"

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Check:

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To check the solution, substitute r = 0 in original equation. \"\"

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\"\"          (Multiply: \"\")

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

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

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Compare the values, the equation is true.

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The solution is all set of real numbers.\"\"

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The value of r is all set of real numbers.