JAMB 2011 · UTME · Q7

Combine the logs: adding multiplies and subtracting divides, so the left side is $\log_3 \frac{18 \times 3}{x} = \log_3 \frac{54}{x}$.

Change to index form: $\frac{54}{x} = 3^3 = 27$.

So $x = \frac{54}{27} = 2$, option B.