The Lutz family has two children, Darwin and Aimee, but only one computer. Mr. Lutz allows his children to use the computer, one child at a time. He devised a formula so Darwin and Aimee know how much computer time they are allowed each day: Minutes of Computer Time per Day = Child's Age in Years x 5

Each day, Darwin gets 45 more minutes of computer time than Aimee. Darwin and Aimee get one hour and 45 minutes of daily computer time altogether. Based on this scenario, how much older is Darwin than Aimee?