Are you sure about that? You can write a complex number as, say, " " meaning but it would be strange to put that "j" in front. "4000<0" is just the real number 4000 and "2000<90" is the imaginary number 2000j. Perhaps they mean for you to multiply them by j and -j? That would give 4000j and +2000.
Pesky j (i) numbers. '<' denotes polar angle.
In any case, Cramer's rule says that the solutions to ax+ by= e and cx+ dy= f are given by
The rest is arithmetic.
[quote]I think I'll have to break it down so that like terms read straight downwards, so in this case, there will be a 20V1 in equation 1, but there will effectively be 0V1 in equation 2. Is this thinking correct?[quote]
No, the coefficient of V1 in equation 2 is 20j. You cannot do the real and imaginary parts separately.
Any help will be much appreciated. Thank you in advance.