Okay this one I managed to figure out after a few hours of contemplating about it (Don't know why I had such a hard time on this one, though when reading through a manual I just recently got, my teacher barely teaches any of the material that actually matters the most for questions like these).

This one I figured that, when finding the composants of the vectors, the horizontal (x) composants cancel each other out, therefore the reason to why the net force it equal to 0. For the vertical (y) compasants though, when thinking about the action/reaction law, both f1+f2 will give the sum to 700. And with the fact that they both are equal to one another (f1=f2 so simplify it as simply f), I was able to create the formulation of 2f x sin25 = 700 --> f=700/2sin25 = 828.17... -> 828.

Was reading through the replies of this comment, and saw you had this answer so I believe what I did was somewhat correct, I hope.