A bookshelf sits on top of a large desk. Together, their height is 6.75 feet. The difference between their heights is 1.85 feet. How tall is the bookshelf?? Let the height of the bookshelf = x and the height of the desk = y.
◯ 2.05 feet
◯ 4.30 feet
◯ 2.45 feet
◯ 5,10 feet