Choice Bhoice D is the correct answer.

1. Start with the equation: $\frac{x}{5} - 4 = 6$
2. Add 4 to both sides: $\frac{x}{5} = 6 + 4$
3. Simplify: $\frac{x}{5} = 10$
4. Multiply both sides by 5: $x = 10 \times 5$
5. Simplify: $x = 50$
6. Verify: $\frac{50}{5} - 4 = 10 - 4 = 6$ ✓

Choice Bhoice D is incorrect because this results from subtracting 4 from 6: $2$, then $2 \times 5 = 10$. Wrong inverse operation.

Choice Bhoice C is incorrect because this is the value of $\frac{x}{5}$. You must multiply by 5.

Choice Bhoice C is incorrect because this results from dividing 10 by 5: $2$. We need to multiply.