Exercise 3

System in four unknowns with Gaussian elimination

Solve with Gaussian elimination the system in the unknowns $x_{1}, x_{2}, x_{3}, x_{4}$

{x_{1} - x_{2} + 2 x_{3} + x_{4} = 1 2 x_{1} - 2 x_{2} + 5 x_{3} + 3 x_{4} = 4

The full solution of this exercise is in the unlocked version.