First condition of equilibrium problem help

[MorphuesMark]

Anyone know how to solve this one?

Homework Statement

Determine weights w1 and w2 that cause the tension T in the horizontal cable to be 100 N.

Here's the diagram:
http://tinypic.com/m/f56cyb/2

Homework Equations

All I know is the component method but. . .I'm not sure how to apply it here.

The Attempt at a Solution

I really have no idea where to start, so please help!

 

[LawrenceC]

Since the whole cable setup is not in motion nor is it in impending motion, what must the tension in the cable that makes the 30 degree angle be?

Once you decide on that, draw a free body diagram of the cable joint and perform the usual force balance in the x and y directions.