meesaStupid

*obs ax = a*x and so on)

I have

ax - y - z = 0
-x + by - z = 0
-x - y + cz = 0

I've gotten this far

ax - y - z = 0
(ab - 1)y  - (a + 1)z = 0
-x - y + cz = 0

But i cant get any further.