After x weeks: Jules will have: 1,200 + 40 x. Kelsey will have: 400 + 50 x. If we want to know in how many weeks will they have the same amount of money, we will make an equation: 400 + 50 x = 1,200 + 40 x 50 x - 40 x = 1,200 - 400 10 x = 800 x = 800 : 10 x = 80 Answer: In 80 weeks they will have the same amount of money.