Problem: if 5 % more is gained by selling an article for rs . 350 than by selling it for rs . 320 , the cost of the article is
Rationale: "explanation : let c . p . be rs . x . then , 5 % of x = 350 - 320 = 30 x / 20 = 30 = > x = 600 answer : e"
annotated_formula: divide(subtract(350, 320), divide(5, const_100))