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## Homework Statement

I need to find the total impedance in a circuit that has:

j60 ohms, 30 ohms, -j60 ohms and 20 ohms in parallel

## Homework Equations

Z

_{total}=1/(Z

_{1}+ Z

^{2}+ Z

_{n})

## 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.