5 -3 -34
10 -5 -65
(-5, +3)
see
http://matrix.reshish.com/gaussSolution.php
Write the system of equations as an augmented matrix. Then solve for x and y.
5x-3y=-34
10x−5y=−65
3 answers
Click on Gauss Jordan there of course.
Oh, and you might want to click on "very detailed solution" :)