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## Homework Statement

## Homework Equations

Resistors in Series = R1 + R2 + R3... = Req

Resistors in Parallel = 1/R1 + 1/R2 + 1/R3 ... = 1/Req

## The Attempt at a Solution

Studying for a test. This sample exam went pretty well. I am having trouble with 3 out of the 20. I can't figure this one out.

The bottom branch can be combined to be Req = 30 + 30 = 60 Ohms

From there, I can't seem to find a way to combine the rest. I have the answer (B) but I can't collapse the circuit.