Current Running into a Dependent Current Source

[jldalton17]

Hi

I am having trouble determining what my equation for a current should be and was looking for some help.

Its a single node pair circuit : ( Attached )

As you can see below the circuit i have expressions for i (sub) a & i (sub) c, but a very wrong expression for i (sub) b. I'm looking for some help with determining i (sub) b for a KCL.


Thanks
Jon