In your own words, list the steps required to apply the superposition theorem.
If an algebraic sum in Table 4-8 is negative, what does this indicate?
Figure 4-8
Prove that Kirchhoff's Voltage Law is valid for the circuit in Figure 4-5. Do this by substituting the measured algebraic sums from Table 4-8 into a loop equation written around the outside loop of the circuit.
Prove Kirchhoff's Current Law is valid for the circuit of Figure 4-5 by writing an equation showing the currents entering a junction are equal to the currents leaving the junction. Keep the assigned direction of current from step 5 and use the signed currents computed in step 10.

Use the superposition theorem to find the current in 𝑅2 in Figure 4-8:
Answer: