1. **State the problem:** Cameron sold 7 classic paperbacks for cash, then spent 4 of his earnings on a book light and had 6.50 left. We need to find the value of each paperback. 2. **Define variables:** Let $x$ be the value of each paperback. 3. **Write the equation:** Total earnings from 7 books is $7x$. After spending 4, he has 6.50 left, so: $$7x - 4 = 6.50$$ 4. **Solve for $x$:** Add 4 to both sides: $$7x = 6.50 + 4$$ $$7x = 10.50$$ Divide both sides by 7: $$x = \frac{10.50}{7}$$ $$x = 1.50$$ 5. **Interpretation:** Each paperback was sold for 1.50. **Final answer:** Each paperback is worth $1.50.