yeah sure: The circuit at the very top is the circuit I'm supposed to solve for Vsub0. The part bracketed i1 is where I'm trying to find the first current source's contribution to vsub0. So I kill the second current source, and then do a source transformation. Then I used voltage division to come up with vsub0
The second bracket is where I'm looking for isub2's, the second current source's contribution to vsub0. I killed the other current source and source transformed it similarly to the other one. Then I used voltage division again.
Then finally I added both of the contributions. We only discussed this in class for aabout 5 minutes, so I'm unsure if I'm doing it right.