Numerical Method - Old Questions

4. Solve the following set of equation using Gauss elimination or Gauss Jordan method.         (8)

        3x₁ + 5x₂ - 3x₃ + x₄ = 16

        2x₁ + x₂ + x₃ + 4x₄ = 9

        3x₁ – 4x₂ – x₄ = 1

        2x₁ + x₂ – 3x₃ + 9x₄ = 5