Ed planned to read 25 pages a day of his favorite book by some deadline. however, he read 8 pages more a day and there were just 10 pages left reading 2 days before the deadline. how many pages the book has?

175 pages

Step-by-step explanation:

Let's call 'd' the number of days before the deadline, and 'n' the total number of pages of the book.

We have the following equations:

(1) --> if we multiply the number of pages per day (25) times the number of days (d), we get the total number of pages of the book (n)

(2) --> he reads 8 pages more per day (so, 25+8), for a number of days equal to (d-2) (d is the deadline), and he reads a total of n-10 pages (because only 10 are left)

We can substitute (1) into (2) and we find:

So, the deadline is 7 days, and from eq.(1) we find the number of pages in the book:

1. minimum

2. 6400

3. eight

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