Mrs Tay had 425 cookies at first. After giving Mrs Chan 65 cookies, Mrs Tay had 3 times as many cookies as Mrs Chan. How many cookies did Mrs Chan have at first?
425 - 65 = 360 ( what mrs tay has left. ) 360 / 3 = 120 ( no. of cookies mrs chan has ) 120 - 65 = 55 ( cuz mrs chan received the 65 cookies from mrs tay at first )
