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Homework Help: Kirchoff Law Problem (please help me)

  1. Sep 20, 2010 #1
    Kirchoff Law Problem (please help me):(

    I need help trying to find the current I1 which flows through R1 and the current I3 that flows through R3.

    R1= 110

    I figured out that the first equation is: I1=I2+I3
    The 2nd equation: 8V-160I1-40I2-50I3=0
    3rd equation: 4V+40I2-50I3=0

    I'm not sure what to do from here.

    thank you:)

    Attached Files:

  2. jcsd
  3. Sep 21, 2010 #2
    Re: Kirchoff Law Problem (please help me):(

    Your second equation is wrong. fix that, and then you will have a set of 3 equation for three unknowns (I_1,I_2,I_3). Solve this system of equations and you are done.
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