Sophia finished 23 of a book

Sophia finished 23 of a book. She calculated that she finished 90 more pages than she has yet to read. How long is her book?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #719