Heather has $500 in her savings account. She withdraws $20 per week for gas. Write an equation Heather can use to see how many weeks it will take her to have a balance of $200.
So first I would subtract 200 from 500 so you have 300. Then take 300 and divide it by 20 so you answer is it will take 15 weeks to get her to have a balance of $200. 20x + 200 = 500 x = 15
