$$5x-2y+9z=-7; -2x+y-4z=5; 3x-10y-8z=0$$
$x = \frac{194}{31} = 6\frac{8}{31} \approx 6.258064516$
$y = \frac{139}{31} = 4\frac{15}{31} \approx 4.483870968$
$z = -\frac{101}{31} = -3\frac{8}{31} \approx -3.258064516$
