I have a circuit to solve:
In this approach, I inferred the V1 from the parallel connection of voltage source. For the second node, I have applied the KCL.
I also tried to do it another way, by modifying the source E4 ( pushing it to the branch with G2 ) and then tried to apply nodal analysis.
Equation was like :
As You can see, both results differs by 'G5' in denominator. What is wrong?