Carla makes $20 for each lawn she mows. The money she makes depends on the number of lawns she mows. How much money will she make if she mows 5 lawns? Follow the steps to write and solve an equation to represent the situation and solve the problem.

1. Let y represent the money Carla makes and x represents the number of lawns she mows. Write an equation that represents this situation. Tell which variable is the independent variable. Explain how you know.

2. Since Carla mows 5 lawns, substitute 5 for x in the equation you wrote. Then simplify the resulting equation. Show your work.

3. How much money does Carla earn for mowing 5 lawns?