Solve the linear system LaTeX: \displaystyle \begin{cases} - 5 x - 7 y - 5 z = -19 \\ 9 x + 6 y - 8 z = -29 \\ - 8 x + 6 y - 6 z = 92 \\ \end{cases}

The Solution is LaTeX: \displaystyle (-7, 7, 1) .