Need help with a few questions Greatly appreciate it if you

Need help with a few questions. Greatly appreciate it if you could show work to help me understand.

Solution

Your matrix

Find the pivot in the 1st column and swap the 2nd and the 1st rows

Multiply the 1st row by 3

Subtract the 1st row from the 2nd row and restore it

Make the pivot in the 2nd column by dividing the 2nd row by -10

Multiply the 2nd row by 3

Subtract the 2nd row from the 1st row and restore it