Solve the System of Linear Equations $\left\{ \begin{array} { r } 3 x + y - 5 z = - 14 \\x - 2 z = - 4 \\- 7 x + 15 z = 31\end{array} \right.$

question 80

Essay

Solve the system of linear equations. $\left\{ \begin{array} { r } 3 x + y - 5 z = - 14 \\x - 2 z = - 4 \\- 7 x + 15 z = 31\end{array} \right.$

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