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**1. Homework Statement**

http://i.imgur.com/ij4eHqM.png?1?5000

**2. Homework Equations**

KVL, KCL, Ohm's Law, I guess

**3. The Attempt at a Solution**

Tried node analysis but I get 4 equations in 5 variables, so no specific solution. I don't think the circuit can be simplified either. A friend suggested mesh analysis but I don't think that works here because we have loops but they aren't meshes. I'd like just a hint in the right direction please, perhaps what approach I should try, I'd still like to do most of it myself. Thanks :)