1. **State the problem:** Josh went to the store 5 days, buying a sandwich and a comic book each day. He spent a total of 40 dollars. Each sandwich costs 4 dollars. We need to find the cost of each comic book, denoted as $c$. 2. **Write the equation:** Since each day he buys one sandwich and one comic book, the total cost for one day is $c + 4$. Over 5 days, the total cost is $5(c + 4)$. This equals 40 dollars. 3. **Equation:** $$5(c + 4) = 40$$ 4. **Solve the equation:** Divide both sides by 5: $$\cancel{5}(c + 4) = \cancel{5}8$$ which simplifies to $$c + 4 = 8$$ 5. Subtract 4 from both sides: $$c + \cancel{4} - \cancel{4} = 8 - 4$$ which simplifies to $$c = 4$$ 6. **Answer:** Josh paid 4 dollars for each comic book.