Use Gaussian Elimination to Solve the System of Equations $$x - y + 3 z = - 1$$

Multiple Choice

Use Gaussian elimination to solve the system of equations.
- $$x - y + 3 z = - 1$$
$5 \mathrm { x } + \mathrm { z } = 1$
$x + 5 y + z = 21$

A) $( 1,0,4 )$
B) No solution
C) $( 0,4,1 )$
D) $( 1,4,0 )$