A depositor deposited Tk. 4,000 as x% simple interest and Tk. 5,000 at y % simple interest. received annual interest of Tk. 320 on his deposited amounts at the year end. If he could deposit Tk. 5,000 at x% simple interest and Tk. 4,000 at y% simple interest, he would recce annual interest of Tk. 310. Find the value of x and y.
(Interest)
