Use Gaussian elimination to solve the systems:

2x + 3y - z = 4

4x - 2y + 3z = -7

-6x + 7y - 7z = 3

x = -7.5

y= 9.3

z= 8.9

Im a little stumped, the answer i got for x y and z when plugged in, do not work and are incorrect. I would post my work (around 5 or 6 steps) but I trashed it after finding out it was wrong therefore losing it..

Would anyone be willing to show me step for step how to solve this problem?

thanks so much!!