If you save 75$ every week and your friend saves 50$ a week, after how many weeks will both of you have he same amount of money

If you keep getting money he wont catch up, but if not he'll get $7.14 a day up to $100. He will be pass you so you will take out some days so you both are at $75 on the 4 day of the next day you guys will be close he will have $78.56.