Kirchoff's Rules Homework: Solving 3 Unknowns in a Circuit

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SUMMARY

The discussion focuses on solving a circuit problem using Kirchhoff's Rules, specifically addressing three unknown currents (I1, I2, I3) in a system of equations. The equations provided are: 4.64v = -200I1 - 800I3, 4.64v = 750I3 + 800I2, and 4.64v = -200I1 - 750I3. The user is guided to represent these equations in a 3x3 matrix format for solving via Excel. A correction is noted regarding a potential typo in the first equation involving the term 800I3.

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Homework Statement


This is the circuit I'm working on:
cir.gif


Homework Equations


My equations are:
4.64v=-200I1-800I3
4.64v=750I3+800I2
4.64v=-200I1-750I3

The Attempt at a Solution


I should have a third unknown in each equation. I not seeing where I'm going wrong. I'm supposed to put this in a 3X3 matrix and have Excel solve for the simultaneous equations. Any help?
 
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There are three different loops that you can sum the voltages around in the problem. The one involving R2 and R3 does not include the battery. So the sum around that loop should be zero. Your first equation also has an 800I3. Typo?
 

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