Explain how to write and solve the equation to solve the problem. Bella saved enough money to buy 3 books. If each book cost $13, how much money did Bella save?

Sample Response: The variable represents the amount of money Bella saved. The amount of money Bella saved divided by 3 is equal to 13. You can write this as an equation as x 3 = 13. Solve by undoing division by multiplying by 3 on both sides of the equation. The solution is x = $39.

Let x be be the amount of money Bella can buy.

Total amount Bella saved = 13x

Bella saved enough for 3 books.

x = 3

Total amount saved = 13 (3) = $39

Answer : $39