1. **State the problem:** Solve the equation $X = \frac{7}{2} - y$ for $y$. 2. **Isolate $y$:** To solve for $y$, we want to get $y$ alone on one side of the equation. 3. **Rearrange the equation:** Add $y$ to both sides and subtract $X$ from both sides: $$y = \frac{7}{2} - X$$ 4. **Explanation:** We moved $y$ to the right side and $X$ to the left side to isolate $y$. This is a simple linear equation rearrangement. 5. **Final answer:** $$y = \frac{7}{2} - X$$