A man sells an article at a gain 15%

A man sells an article at a gain 15%. If he had bought it at 10% less and sold it for 9 less, he would have gained 25%. Find the cost price of the article.

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 #44393