How to find current in this circuit passing through 4ohm resistor

Question

Below I have added my solution after the question so please let me know how I can solve it after the last step:

These steps to follow to solve the question from where i left in my post ,

FYI :As the registance values are in killo ohm so current will be in mill amp and power will be milli watt .

Thanks a lot to @g36, @jasen and @rabi for your help . i learned something new today and its really going to help me in solving circuits easily.

Answer 1

Try to redraw it this way next time:

^{simulate this circuit – Schematic created using CircuitLab}

Notice how I mark the same node with different colors to see what is connected to what.

Also, notice that we can skip the left \$ 12\Omega\$ resistor (R1) because it is connected directly across the voltage source

So we are left with this:

^{simulate this circuit}

Answer 2

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.

Answer 3

This will be your next simplified circuit. Now find the current through 3 ohms resistor. Then use parallel technique to find current in 4 ohms in your previous circuit.