You're nearly there.
In your last circuit the top and bottom 12 ohm resistors are in parallel.
simulate this circuit – Schematic created using CircuitLab
You're nearly there.
You're nearly there.
In your last circuit the top and bottom 12 ohm resistors are in parallel.
In your last circuit the top and bottom 12 ohm resistors are in parallel.
simulate this circuit – Schematic created using CircuitLab
You're nearly there.