Q. Compute the output voltage of V₀.

Solution:          By redrawing this circuit like

                                    Thus   V₁ = 6 and the constraint equation will be

                                                              V₁ - V₃ = 3volts

                                                                   6 - V₃ = 3volts                                                      

                                                               V₃ = 6 - 3 V

                                                                      V₃ = 3 V

                                    Also,                            V₃=V₀ = 3 V

                                    Therefore                      V₀ = 3 V             Ans.