James has saved $50. He wants to buy a DVD player for $149 in about 5 months. To find out how much he should save each week he wrote 50+20x=149. Explain his equation.

I will be happy to critique your thinking.

James is trying to figure out how much money he needs to save each week in order to reach a total of $149 in 5 months.

The equation he wrote, 50 + 20x = 149, represents this situation. Let's break it down:

- The $50 represents the initial amount that James has already saved.
- The term 20x represents the amount of money James needs to save each week. The variable x represents the number of weeks.
- The equation is set equal to 149, which is the total amount James wants to save by the end of the 5 months.

By setting up this equation, James is able to solve for x and find out how many weeks it will take for him to save enough money.