1. **State the problem:** We are given the area of a rectangular living room wall as 121 square feet and the height (width) of the wall as 11 feet. We need to find the length of the wall. 2. **Formula used:** The area $A$ of a rectangle is given by the formula: $$A = \text{length} \times \text{width}$$ 3. **Given values:** - Area $A = 121$ square feet - Width $w = 11$ feet 4. **Find the length $L$:** Using the formula: $$121 = L \times 11$$ 5. **Solve for $L$:** Divide both sides by 11: $$L = \frac{121}{11}$$ Show cancelation: $$L = \frac{\cancel{11} \times 11}{\cancel{11}}$$ 6. **Simplify:** $$L = 11$$ 7. **Answer:** The length of the living room wall is **11 feet**.