Solve the following system of equations using matrices. Use Gaussian elimination with back substitution or Gauss-Jordan elimination.

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

• A. {(3, -1, 0)}
• B. {(2, -1, 0)}
• C. {(3, -2, 1)}
• D. {(2, -1, 1)}