Choice Bhoice C is the correct answer. This is another special case where zero is the solution.

1. Start with the equation: $x + 5 = 5$
2. Subtract 5 from both sides: $x = 5 - 5$
3. Simplify: $x = 0$
4. Verify: $0 + 5 = 5$ ✓

This demonstrates the additive identity: adding zero to any number leaves it unchanged.

💡 Identity Property: For any number $a$, we have $a + 0 = a$. So when $x + 5 = 5$, we know $x = 0$.

Choice Bhoice C is incorrect because this confuses the constant (5) with the solution. Seeing the same number on both sides doesn't mean $x$ equals that number.

Choice Bhoice D is incorrect because this results from adding: $5 + 5 = 10$. This is the wrong operation.

Choice Bhoice D is incorrect because some students might think "dividing the same numbers gives 1," but division isn't how we solve addition equations.