1. The problem statement, all variables and given/known data This is not for a mathematics unit but is part of an electrical question I'm trying to solve but I cannot solve this equation. The complex numbers Zp and Zr are both real and imaginary, whereas Xm is purely imaginary. 2. Relevant equations Zp = (Xm*Zr)/(Xm+Zr) Zp = 29.76+j15.72 Xm = j95 3. The attempt at a solution Zp = (Xm*Zr)/(Xm+Zr) Zp(Xm+Zr) = (Xm*Zr) Zp*Xm + Zp*Zr = Xm*Zr (Zp*Xm)/Xm + (Zp*Zr)/Xm = Zr Zp + (Zp*Zr)/Xm = Zr I just do not know how to get Zr on it's own then I can approach solving it, either way i see it will have Zr on either sides of the equation. So even before substituting i feel it is the wrong approach.