Label the nodes and apply KCL:
[i = 1 \text{ A}] Problem 3.15
Solve for (i):
[10i + 20i = 30]
Use nodal analysis to find (v_1) and (v_2) in the circuit of Fig. 3.73.
[V_{oc} = 12 \text{ V}]
Find the Thevenin equivalent circuit for the circuit of Fig. 4.78.
