Brahh, I'll hunt up some textbooks tomorrow. For now, it is bed time. And, btw, Devilsdragon, I wasn't forcing you to google anything. EDIT Let j and any power or coefficient of j, eg 2j, be a complex number, and not real. To solve this equation, we gather all the imaginary parts and all the real parts and compare. If you hate maths, look away now: (1 + j)z = 3 + j z + zj = 3 + j z = 3 (that's the comparison of the real bits) zj = j (and that's the imaginaries) :. 3j = j :. 3 = 1. There's an abridged version. It's sort of hard to teach, I'm glad I'm not a teacher. :)