A man purchases 2 watches for $ 400

A man purchases 2 watches for $ 400. He sells one at 10% profit and the other at a loss of 15%. He neither gains nor loses on the whole. Thus, the cost price of two watches are :

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 #15077