MathAlgebraLinear algebraSystems of linear equations

Solving linear systems using the Gauss elimination

Solve a linear system in matrix form

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Solve the system

$\left( \begin{array}{ccc|c} 1 & -1 & 1 & 8\\ 2 & 3 & -1 & -2\\ 3 & 2 & -9 & 9\\ \end{array} \right)$

In the answer field write the value of $x$ .

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