Question: User: -$\sqrt{5}$ + X = $\sqrt{5}$
1. **State the problem:** Solve for $X$ in the equation $$-\sqrt{5} + X = \sqrt{5}.$$
2. **Isolate $X$:** To find $X$, add $\sqrt{5}$ to both sides of the equation:
$$-\sqrt{5} + X + \sqrt{5} = \sqrt{5} + \sqrt{5}.$$
3. **Simplify both sides:** The left side simplifies by canceling $-\sqrt{5}$ and $+\sqrt{5}$:
$$\cancel{-\sqrt{5}} + X + \cancel{\sqrt{5}} = 2\sqrt{5}.$$
4. **Final solution:**
$$X = 2\sqrt{5}.$$
Thus, the value of $X$ is $2\sqrt{5}$.