Solve: 2 ln 3 = ln(x - 4)

Use the logarithm rule 2 ln 3 = ln(3²) = ln 9. Since the natural logarithms are equal, their positive arguments must be equal: x − 4 = 9. Adding 4 gives x = 13, which satisfies the requirement x > 4. The correct choice is x = 13.

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