1. The problem statement, all variables and given/known data I need to find the total impedance in a circuit that has: j60 ohms, 30 ohms, -j60 ohms and 20 ohms in parallel 2. Relevant equations Ztotal=1/(Z1+ Z2+ Zn) 3. The attempt at a solution I've tried doing this, but what I think is the -j60 and the j60 should cancel therefore leaving only the 30 ohms and 20 ohms in parallel, which would equal 1/50, but the answer says it is 12 ohms. Attached is an image of the circuit and answer.