How do you solve using gaussian elimination or gauss-jordan elimination, #3x + y + 2z = 3#, #2x - 37 - z = -3#, #x + 2y + z = 4#?
I assume that there is a transcription error in the question and the second term in the second equation should actually be a
Adding together the second and third equations gives us
Next, doubling the second equation and adding it to the first gives
Solving these two equations gives