If john makes a contribution to a charity fund at school, the…

If john makes a contribution to a charity fund at school, the average contribution size will increase by 50% reaching $75 per person. If there were 1 other contributions made before john's, what is the size of his donation?

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 #47797