a trader sold an item at a loss of 35 % . if he had increased the price by $ 80 he would have made a gain of 5 % . what is the cost price of the item ?
"let c . p . be $ x then 105 % of x - 65 % of x = 100 40 % of x = 100 40 / 100 * x = 100 40 x = 10 000 x = 250 answer is e"
divide(multiply(80, const_100), multiply(subtract(add(const_1, divide(5, const_100)), subtract(const_1, divide(35, const_100))), const_100))