Reactions problem. Please Help

Hello. I am having a test coming up soon and am totally lost on how to calculate reactions at given points. In this example I am to solve for Reactions at point A & B.

http://i34.tinypic.com/30w9nwz.png

So the first thing I would do is spit this in half into 2 different shapes, one triangle and one rectangle correct?

If I was to solve for the triangle would I do this:

$\displaystyle force = (2.5 kN/m - 0.5 kN/m) * 3 = 6$

And its location is:

$\displaystyle \frac{3}{3}$ to the right of A?

Is this correct? If not, could someone please explain on how you would approach this question?

Thank you(Happy)