Question
Solve the system using either Gaussian elimination with back-substitution or Gauss-Jordan elimination.$$\begin{aligned}&x+3 y=11\\&3 x+y=9\end{aligned}$$
Step 1
This gives us the augmented matrix \[ \begin{bmatrix} 1 & 3 & 11 \\ 3 & 1 & 9 \end{bmatrix} \] Show more…
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