Choice Bhoice D is the correct answer. We divide by the coefficient to isolate $x$.

1. Start with the equation: $2x = 18$
2. Divide both sides by 2: $x = \frac{18}{2}$
3. Simplify: $x = 9$
4. Verify: $2(9) = 18$ ✓

💡 Even Number Division: Dividing even numbers by 2 is straightforward—half of 18 is 9.

Choice Bhoice D is incorrect because this results from subtracting: $18 - 2 = 16$. Subtraction is not the inverse of multiplication.

Choice Bhoice A is incorrect because this comes from adding: $18 + 2 = 20$. Addition doesn't undo multiplication.

Choice Bhoice C is incorrect because this results from multiplying: $18 \times 2 = 36$. This doubles the product instead of isolating $x$.