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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...
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