1. **State the problem:** Simplify the expression $$\frac{18x}{6x}$$. 2. **Recall the rule:** When simplifying fractions, divide the numerator and denominator by their greatest common divisor (GCD). 3. **Identify the GCD:** The GCD of 18 and 6 is 6. 4. **Simplify the coefficients:** $$\frac{18}{6} = 3$$. 5. **Simplify the variables:** Since both numerator and denominator have $$x$$, and $$x \neq 0$$, they cancel out. 6. **Final simplified expression:** $$3$$. Therefore, $$\frac{18x}{6x} = 3$$.