Solve the system of equations by finding the reduced row-echelon form of the augmented matrix for the system of equations.

Question

x + y - z = -2
2x - y + 3z = 9
x - 4y - 2z = 1

Answer 1

There is a handy calculator here, to check your work:

www.math.odu.edu/~bogacki/cgi-bin/lat.cgi?c=rref

Answer 2

3,4,6