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## Homework Statement

If the circuit of parallel and series resistors , is as follows , what's the equivalent resistance for the group?

## Homework Equations

neglecting the battery internal resistance... irrelevant to the question.

## The Attempt at a Solution

I tried to do the following

R1=8+12=20 ohms

R2=4+6=10 ohms

R3=9 ohms

then,

R(equivalent)= R1//R2//R3

but i'm not sure!