MathAlgebraLinear algebraSystems of linear equations

Solving linear systems using the Gauss elimination

Theory

Solve the system and find y.

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Solve the system

{x+y−z=62x+3y−4z=217x−y−3z=6\begin{cases} x+ y-z= 6\\ 2x+3y-4z= 21\\ 7x-y-3z = 6 \end{cases}

In the answer field write the value of y.

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