I need help with the first 2 questions i just dont understand them, please help

For a read-a-thon, jay and odhràn each started reading a book at the same time and continued reading for several hours. jay's book had 278 pages, and he read 55 pages per hour. odhràn's book had 238 pages, and he read 45 pages per hour. after how many hours did they have the same number of pages left, and how many pages were left?

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

To determine the number of deer in a forest a forest ranger tags 280 and releases them back