Mike has already written 8 pages, and he expects to write 1 page for every additional hour spent writing. How many hours will Mike have to spend writing this week in order to have written a total of 42 pages?
You did not state how long writing 8 pages took, so I'm assuming it takes the constant of 1 hour, totalling 8 hours.
The rest of the pages take 1 hour each to write, so the rest of the pages he has to write is
Therefore, he would take in total