- #1

Hertz

- 180

- 8

I have 5 unknowns so I need to find 5 non redundant equations. The problem is, every system of equations I come up with is singular. In other words... I am trying to set up a matrix equation ##A x = b## but my matrix A keeps having determinant zero!

**Is there any general rule to follow in order to find a non redundant set of equations?**This is really time consuming!

If you are curious, here is an example system which I came up with, but in some way it's redundant.

Code:

```
V = R1 I1 + R4 I4
V = R2 I2 + R5 I5
V = R1 I1 + R3 I3 + R5 I5
V = R2 I2 - R3 I3 + R4 I4
0 = R1 I1 - R2 I2 + R4 I4 - R5 I5
```