ARTICLE = Rs. xDiscount % = (x - 40)%SP of the articles = Rs. (x - 32)Formula:SP = MP × (100 - Discount%)/100CalculationAccording to the QUESTION(x - 32) = x × (100 - x + 40)/100⇒ x - 32 = x × (140 - x)/100⇒ 100X - 3200 = 140x - x2⇒ x2 - 40x - 3200 = 0⇒ x2 - 80X + 40x - 3200 = 0⇒ x (x - 80) + 40 (x - 80) = 0⇒ (x - 80) (x + 40) = 0Taking,⇒ (x - 80) = 0⇒ x = 80∴ MARKED price of the article is 80.