Sorry, but what do you mean, there are three circuits and you have given one answer, so which one are you applying that result to, or is it the same for all three circuits maybe?

oh, I though you give me only 1,

 

See the new drawing.

This one, final result 8v/s

 

This one, final result 8v/s

Ok well you are not paying attention at all to your replies.
You still have not indicated which one you are saying is 8v/s.
BTW, none of the three results are 8v/s.
If you want to learn about this you should try to solve all three as this would be important for what you are studying.
If you don't want to then I just have to assume you just don't care about learning about this, and that's ok with me if that's ok with you.