1. **State the problem:** Solve the equation $1 + 7(-7k + 5) = -111$ for $k$.
2. **Apply the distributive property:** Multiply 7 by each term inside the parentheses:
$$1 + 7 \times (-7k) + 7 \times 5 = 1 - 49k + 35$$
3. **Simplify the left side:**
$$1 - 49k + 35 = 36 - 49k$$
4. **Rewrite the equation:**
$$36 - 49k = -111$$
5. **Isolate the term with $k$:** Subtract 36 from both sides:
$$36 - 49k - 36 = -111 - 36$$
$$\cancel{36} - 49k - \cancel{36} = -147$$
$$-49k = -147$$
6. **Solve for $k$:** Divide both sides by $-49$:
$$\frac{-49k}{-49} = \frac{-147}{-49}$$
$$\cancel{-49}k / \cancel{-49} = 3$$
$$k = 3$$
**Final answer:** $k = 3$
Solve Linear 1Ab349
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