1. **State the problem:** We need to evaluate the expression $Y + \frac{x}{7} - 4$ given that $Y = -9$. 2. **Substitute the known value:** Replace $Y$ with $-9$ in the expression: $$-9 + \frac{x}{7} - 4$$ 3. **Simplify the constants:** Combine $-9$ and $-4$: $$-9 - 4 = -13$$ So the expression becomes: $$-13 + \frac{x}{7}$$ 4. **Final expression:** The simplified expression is: $$-13 + \frac{x}{7}$$ This is the evaluated form of the expression with $Y = -9$. To find a numerical value, you need to know $x$.