Heres the system:

(D + 2)x + (D^2 + 2D)y = 5e^(-t)

(D + 1)x - (D + 2)y = 0

I want to solve for y with no fractional answer on the "x and D" side. The only solution I can seem to come up with is y = x times D something divided by some second degree polynomial of D. This doesn't do me any good. Any suggestions?