Algebra 2HardSystems of Equations

Systems of Equations · Hard problem

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

\begin{cases} - 3 x - 3 y + 3 z = 18 \\ 3 x + z = 2 \\ - 5 x - 3 y + 3 z = 20 \end{cases}