The problemas statement is:
"Find Vo and Io by the superposition principle"
Nodal Analysis and The Superposition Theorem.
The Attempt at a Solution
So, I tried to shutdown first the independent 30V tension font. It led me to Vo = 8V.
Then, turning off the 6A current font, led me to Vo = 2V.
So the final Vo will be equation the sum of the two others: 10V.
The correct anwser is 17,99V(so, Io = 1,799A).