A store sells a certain product at a fixed price per unit

A store sells a certain product at a fixed price per unit. At the product's current price, f units cost a total of exactly $300. If the price were lowered by $5 from its current value, then f + 2n units would cost exactly $300; if the price were raised by $5, then f – n units would cost exactly $300. What is the value of f?

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #89686