Choice Choice B is the correct answer. This straightforward multiplication equation uses friendly numbers.

1. Start with the equation: $10x = 50$
2. Divide both sides by 10: $x = \frac{50}{10}$
3. Simplify: $x = 5$
4. Verify: $10(5) = 50$ ✓

💡 Decimal Pattern: Dividing by 10 is easy—just move the decimal point one place to the left: $50.0 \rightarrow 5.0$.

Choice Choice B is incorrect because this results from subtracting: $50 - 10 = 40$. Subtraction is not the inverse of multiplication.

Choice Choice D is incorrect because this comes from adding: $50 + 10 = 60$. Addition doesn't undo multiplication.

Choice Choice C is incorrect because this results from multiplying: $50 \times 10 = 500$. This compounds the multiplication instead of reversing it.