I have the following differential equations, for modeling predator-prey relationships:

$$\frac{dx}{dt}=Ax-Bxy$$

$$\frac{dy}{dt}=Cxy-Dy$$

Where A, B, C, and D are constants. How could I go about solving this? I've only really worked with basic first order differential equations before, and I've found little to help me figure this out. Any help would be much appreciated.