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**Homework Statement**

2 weights of 20 N and 10 N are hung from 3 ropes. Find the tension of T

_{1}, T

_{2}, and T

_{3}:

**The attempt at a solution**

If I designate one of the points as the origin, I get:

[tex]T_1sin45+T_2sin0+T_3sin30=30 N[/tex]

and

[tex]T_2cos0+T_3cos30-T_1sin45=0[/tex]

I'm having trouble finding a third equation... if those two are even right in the first place.