Engineering [Circuits] Using Superposition find vo

[CircuitsSuck]

I've been trying to to solve this for hours now and I am frustrated. I think I have v_x^', which might be wrong, but I cannot find v_x^" for the life of me. I have posted all my work, I know what I have down so far is correct, but I am missing something to move forward.

Homework Statement

Using Superposition, find vx in the circuit figure.

Homework Equations

v_x= v_x^' + v_x^"

Mesh Analysis (KVL), Node Analysis (KCL), Ohm's Law

The Attempt at a Solution

I cannot find v_x^"! I need i3, but I literally can't find anything in the second circuit. Please help!

http://i61.tinypic.com/2zflrbc.jpg

 

[Kurokari]

Maybe you want to redo your calculation for your nodal analysis at point Vx

Your equation should be 5 = i1 + i3 + i4 (since i2 = i3 + i4), but I see 4 terms in your equation, which should only be 3 terms?

 

[NascentOxygen]

Using Superposition, find vx in the circuit figure.

Unless it is stipulated that you must use mesh or nodal analysis, why don't you do it the easiest way you can see? Then once you can get it right that way, try it afresh using the more formal approach.

The dependent source is active with either source, whether you're considering the 25V source or the 5A source.