(hurry! its due soon! show work! ) write a system of equations to describe the situation below, solve using substitution, and fill in the blanks.

two students in mr. kelley's class, tori and cora, have been assigned a workbook to complete at their own pace. they get together at tori's house after school to complete as many pages as they can. tori has already completed 16 pages and will continue working at a rate of 5 pages per hour. cora has completed 13 pages and can work at a rate of 8 pages per hour. eventually, the two students will be working on the same page. how long will that take? how many pages will each of them have completed?

after _ hours, tori and cora will have each completed _ pages in their workbooks.