Super position with AC circuits, not getting what the book is getting! any ideas?

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Hello everyone!

I'm doing some more circuit analysis and im stuck on this problem. The says:
If superpostion is used on the ciruict, find v1 with (a) only 20mA source operating, and (b) with only the -j[/bj]50 mA operating. j is denoting its in rectangular format. In my problem they have both polar and rectangular. This problem would be easy if i used nodal anayslis but its not allowed. So i was wondering where i screwed up. I found equivlant impedance at v1, and then multiplied it by the current, am i not cauclating V1 if i do this?

Thanks!

http://img75.imageshack.us/img75/6074/lastscan6bp.jpg [Broken]
 
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