Algebra 2HardSystems of Equations

Systems of Equations · Hard problem

Solve the system for $x$ , $y$ and $z$ .

\begin{cases} 5 x - y - 4 z = 11 \\ - 4 x - 5 y + z = -19 \\ - 5 x - 5 y - 2 z = -29 \end{cases}