Answer:
160 pages
Explanation:



Required
The number of pages
Let the number of pages be x.
So, on day 1; we have:

After day 1, there are:
left ----------------- i.e x - 1/4x
On day 2, we have:


At this point, we have:


---- pages left
The summation of all must equal x, the book pages


Simplify the left-hand side

Collect like terms

Simplify


Multiply by 2


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