Andreas has read 35 pages + (20 pages/evening) * number of evenings, and Nicole has read 85 pages + (10 pages/evening) * number of evenings.
Let's denote the number of evenings as \(e\).
Andreas's total pages read: \(35 + 20e\)
Nicole's total pages read: \(85 + 10e\)
If you have a specific number of evenings in mind, you can substitute that value for \(e\) to find the total pages each person has read.