you have given
but
Find a and b if :solution exists, solution doesn't exist, solution is unique, etc
x-y+z=b
-x+ay+2z=1
2x-2y+z=1
I've used row reduction and I just want to verify my answers (got this problem wrong on a test)
infinitely many solutions- a=1 and b=.5
no solutions- b=/.5
unique solution- a=/1 b=.5
thanks
edit- fixed with last solution