Two students in Mr. Lambert's class, Natalie and Isaac, have been assigned a workbook to complete at their own pace. They get together at Natalie's house after school to complete as many pages as they can. Natalie has already completed 40 pages and will continue working at a rate of 10 pages per hour. Isaac has completed 30 pages and can work at a rate of 15 pages per hour. Eventually, the two students will have completed the same number of pages. How many pages will each of them have completed