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## Homework Statement

Okay - the picture is attached, but what I need to find is the current and voltage throughout certain points on the circuit. What I need help on is figuring out how to simplify this circuit in order to find resistance.

## Homework Equations

Parallel Req = (1/R1 + 1/R2)^-1

Series Req = R1 + R2

## The Attempt at a Solution

I know how to combine equations for series and parallel circuits - but what can I do with R4? I need to simplify the circuit, but I know I can't put it in parallel with R5 or R6 since it has resistance in both loops. Is there a way to combine R5 and R6. Let me know please...