1. **State the problem:** Solve the equation $x - y = 0$ for $y$ in terms of $x$. 2. **Understand the equation:** The equation $x - y = 0$ means that $x$ and $y$ are equal because their difference is zero. 3. **Isolate $y$:** Add $y$ to both sides and subtract $0$ from both sides to get: $$x = y$$ 4. **Final solution:** Therefore, the solution is: $$y = x$$ This means for any value of $x$, $y$ will be the same value.