$\"\"$

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The equation is $\"\"$ .

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Apply addition property of equality: If $\"\"$ then $\"\"$ .

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Add 9 to each side.

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$\"\"$

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$\"\"$

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$\"\"$ . $\"\"$

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Substitute the value of $\"\"$ in the equation $\"\"$ .

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$\"\"$

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$\"\"$ .

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This is not true. Therefore $\"\"$ is not a solution of the equation $\"\"$ .

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Substitute the value of $\"\"$ in the equation $\"\"$ .

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$\"\"$

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$\"\"$ .

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This is not true. Therefore $\"\"$ is not a solution of the equation $\"\"$ . $\"\"$

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Substitute the value of $\"\"$ in the equation $\"\"$ .

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$\"\"$

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$\"\"$ .

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This is true. Therefore $\"\"$ is a solution of the equation $\"\"$ .

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Substitute the value of $\"\"$ in the equation $\"\"$ .

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$\"\"$

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$\"\"$ .

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This is not true. Therefore is $\"\"$ not a solution of the equation $\"\"$ . $\"\"$

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The option C is correct answer.