Question

A. Write the linear system as a matrix equation

Answer 1

AX = B

1 -1 -1 x 0
0 -2 -1 y = -2
2 1 0 z -4

x
y = A^-1 B
z

x -1 1 1 0 6
y = 2 -2 -1 . 2 = -8
z -4 3 2 4 14