If 5% more is gained by selling an article for Rs

If 5% more is gained by selling an article for Rs. 350 than by selling it for Rs. 340, the cost of the article is:

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 #24847