Question 13
Cindy and Diane each have some savings. If Cindy spends 20 dollars and Diane spends 10 dollars a day, Cindy will have 3500 dollars remaining when Diane finishes up her savings. If Cindy spends 10 dollars and Diane spends 20 dollars a day, Cindy will have 3950 dollars remaining when Diane finishes up her savings. How much money does Cindy have at first?