Choice B is the correct answer. Isolating negative variable terms requires careful sign management.

1. Subtract 9: $9 - 3x - 9 < 0 - 9$, giving $-3x < -9$
2. Divide by -3: $\frac{-3x}{-3} > \frac{-9}{-3}$ (REVERSE the sign!)
3. Simplify: $x > 3$

?�� Strategic Tip: Dividing both sides by a negative coefficient ALWAYS reverses the inequality direction.

Choice A is incorrect because it fails to reverse the inequality when dividing by -3. Choice C is incorrect because it uses the wrong sign on the boundary value. Choice D is incorrect because while it reverses the sign correctly, the boundary value should be 3, not -3.