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Firstly, this belongs in the Homework subforum. However, since we here at PhysicsForums aren't in the business of doing your homework for you, how would you use source transform in this particular case? You'll note that this conveniently reduces your entire problem down to really only one nodal equation.
Next, this circuit has non-resistive elements: have you been told that you only need to treat these impedances as resistances, or do you need to attach imaginary numbers to these?