In the circuit shown above, determine the current through R2 if V1 = 31.0 V, V2 = 33.3 V, R1 = 128 ohms, R2 = 164 ohms, and R3 = 186 ohms. Enter the current as a positive value if it flows from left to right and a negative value if the current flows from right to left.

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A: the effective resistance of the circuit is 1R=118.5 Ω+123.6 Ω+133.5 Ω=0.054+0.0424+0.0298R=7.924 Ω