FE Exam Practice Problem | Nodal Analysis

[@nielsnijme6711]

Why did you not use polarity when solving the node equations? You just add them up to zero but then how do you know what current is entering or leaving the node? Or do you figure that out in the end by evaluating the polarity of your final values? Thanks!

[@thinking6548]

Thr Vc should be equal to 83.6 v. and consequently Vb is equal to 167.9. Otherwise, great video