Mesh Analysis Question

  1. I understand everything up to the point which I've marked in red...

    [​IMG]

    Can anyone explain those few lines?

    I would greatly appreciate it!

    Thanks.
     
  2. jcsd
  3. Seems like KCL (Kirchoff's Current Law) at node A.
    i1 = i0 + i2

    (sum of currents entering) = (sum of currents leaving)
     
  4. I understand that part, but how did they derive the equation below that line?
     
  5. They just substituted into the equation above.
     
  6. Oh, I see it now. I totally misunderstood the fact that they were simply substituting i0 = i1 - i2 into the third mesh equation.

    Thanks :-)
     
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