a women purchased 3 towels @ rs . 100 each , 5 towels @ rs . 150 each and two towels at a certain rate which is now slipped off from his memory . but she remembers that the average price of the towels was rs . 155 . find the unknown rate of two towels ?
10 * 155 = 1550 3 * 100 + 5 * 150 = 1050 1550 – 1050 = 500 c
subtract(subtract(multiply(add(add(3, 5), const_2), 155), multiply(5, 150)), multiply(3, 100))