1. The problem statement, all variables and given/known data Under what condition will the following system have a unique solution? x -y +2z = 1 ax -ay +4z = 2a x +y +az = 4 Note: a is a parameter. 3. The attempt at a solution I know I'm supposed to solve by turning this into the identity matrix by I really have no idea where to start. Hellp would be much appreciated.