A supernode forms between node 2 and 3. Writing the equation for the supernode, we get $v_{2} - v_{3} = v_{o}$. Since $v_{o}$ and $v_{2}$ are equal, substituting $v_{o}$ equals to $v_{2}$, the equation becomes $2v_{2} - v_{3} = 0$. From here, we get $v_{3} =
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