$\"\"$

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The equation is $\"\"$ .

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(Subtract 9 from each side)

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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(Divide each side by negative 3)

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$\"\"$

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$\"\"$

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$\"\"$

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(Take logarithm each side)

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$\"\"$

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$\"\"$

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(Apply logarithmic formula: $\"\"$ )

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$\"\"$

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(Apply logarithmic formula: $\"\"$ )

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$\"\"$

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(Substitute values $\"\"$ )

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$\"\"$

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$\"\"$ $\"\"$

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The solution is $\"\"$ .