The three nodal equations are:
2 + (V1 - V2) + (V1 - V3).2 = 0.
(V2 - V1) + V2.4 - 3 = 0
3 + (V3 - V1).2 + V3.3 = 0
Writing the three equations in standard form:
3V1 - V2 - 2V3 = -2
-V1 + 5V2 = 3
-2V1 + 5V3 = -3
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