$$\left. \begin{array} { l } { 5 x - 2 y + 9 z = - 7 } \\ { - 2 x + y - 4 z = 5 } \\ { 3 x - 10 y - 8 z = 0 } \end{array} \right.$$
$x = \frac{194}{31} = 6\frac{8}{31} \approx 6.258064516$
$y = \frac{139}{31} = 4\frac{15}{31} \approx 4.483870968$
$z = -\frac{101}{31} = -3\frac{8}{31} \approx -3.258064516$
