# Determine the nodal voltages in the circuit

This is a practice question from book: Engineering circuit analysis / William H. Hayt, Jr., Jack E. Kemmerly, Steven M. Durbin. — 8th ed. (pag. 91) .

Determine the nodal voltages in the circuit: Ans: v1 = 3 V, v2 = −2.33 V, v3 = −1.91 V, v4 = 0.945 V.

And this is one of my attempts (The central node is the reference node): When I solve the matrix (I do it through software so that's not the problem) the answers for voltages are not the right ones. And I don't know what I'm doing wrong (Maybe I'm not stating the equations correctly). • Spice doesn't even come close to the answer numbers you give (which I assume are supposed to be correct.) That 0.15 Vx component is a voltage-controlled voltage source, depending upon (V3-V4), yes?
– jonk
Jun 27, 2020 at 22:39
• @jonk The ones on the "Ans: " quote? Those are exactly as they're in the book. Maybe I should have tested the book answer with a simulator. But I've done that with other exercises before just to notice that book answers are actually right. And yes to what you mention about the 0.15 Vx component. Jun 27, 2020 at 23:23
• Well, Spice says different things. And so do the equations I developed, which match exactly with Spice and do NOT match those numbers. See this. If you find a flaw in that, let me know.
– jonk
Jun 27, 2020 at 23:36