Determining V0: Using Source Transformation and Node Voltage Analysis

[qwerty321]

Hello..well i have the figure above and i need to determine V0..

i am using source transformation but at the end,i am ending up with two variables (Io and VO)
so i think i need a way to get I0 but how?

and if i use the node voltage analysis i end up with the same thing
help pelase
thank you

 

[jhicks]

i am using source transformation but at the end,i am ending up with two variables (Io and VO)

Io = Vo / 2ohm ?