Hello everyone, I would rather find the cofactors and find the determinant than row reducing this, but is it possible, its not square! But our teacher is acting like its possible, so it must be! here is the equations: x+y+z = 4 2x-y+4z=9 3y-z = 1 so i got: 1 1 1 4 2 -1 4 9 0 3 -z 1 a 3x4! but is there anyway for me to solve the following system other then row reduction or augmenting it with the idenity matrix? Thanks!