What was the principal , if at 5% per annum the interest…

What was the principal , if at 5% per annum the interest after 10 years amounted to Rs.3100 less than the sum lent?

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 #93519