Originally Posted by

**Jasked** That's taking me up to about the point where I don't know what to do.

For example, I'm not sure how the bottom row goes from this:

2 a b c

to this:

0 0 1 c/(2a+b-22)

If there were no a, b and c, I wouldn't have any problems with this question. I understand the basic row operations, but if you throw a, b and c in there then I'm not sure what to do. The basic row operations don't appear to be enough to end up with c/(2a+b-22) on the right hand side of the bottom. Pardon me if this isn't technically called RREF (I'm not sure), but that's the solution I'm trying to work towards.