ok so
same as normal matrix except you have a line in place of the equals
just take the coefients and use gausian ellimination
-1x-3y=-17 and
2x-6y-26 translates to
\(\left[\begin{array}{ccc}-1&-3&|-17\\2&-6&|-26\end{array}\right]\)
now use gausian elimination
multiply top row by 2 and add to 2nd collumn
\(\left[\begin{array}{ccc}-1&-3&|-17\\0&-12&|-60\end{array}\right]\)
divide bottom row by -12
\(\left[\begin{array}{ccc}-1&-3&|-17\\0&1&|5\end{array}\right]\)
now multiply last row by 3 and add to first row
\(\left[\begin{array}{ccc}-1&0&|-2\\0&1&|5\end{array}\right]\)
times top row by -1
\(\left[\begin{array}{ccc}1&0&|2\\0&1&|5\end{array}\right]\)
x=2
y=5
