1. ## General question about row reduction.

If i have an end result that has a row of 0's in A but numbers in b, is that a definite sign that something is wrong?

so I'll end up with something like

0x1 + 0x2 + 0x3 = a+b+c

Obviously 0 != any number.

2. Originally Posted by Kuma
is that a definite sign that something is wrong?

No, it isn't. That equation provides a necessary (not sufficient) condition for the system to be compatible: $a+b+c=0$ .