someone help....really hard problem?

Question

Two crates connected by a rope of negligible mass lie on a horizontal surface. (See the figure.) Crate A has mass x and crate B has mass y . The coefficient of kinetic friction between each crate and the surface is u. The crates are pulled to the right at a constant velocity of 3.2 m/s by a horizontal force .

in terms of x, y, and u find the magnitude and tension

http://tinypic.com/fullsize.php?pic=xp7odi&s=2

Answer 1

T = ugx