Hey guys I really need some help on solving 2 algebra problems.

The question states: Solve the system of equations using row operations on the augmented matrix.

Problem 1.

x+y-z=5

x+2y-3z=9

x-y+3z=3

Problem 2.

x-y+z=14

3x+2y+z=19

-2x+y-z=-21

I just want to know the steps on how to solve it one by one and I could solve the problem but as of now I am clueless on how to solve it. If you guys could help me out I would really appreciate it. Thank you in advance.