I am having a lot fo trouble with this question

Use gaussian elimination to obtain an equivalent system whose coefficient matrix s in row echelon form. If system is consistent and there are free variables, transform it to reduce row echelon form and find al solutions.

x1 + 3x2 + x3 + x4 = 3

2x1 - 2x2 + x3 + 2x4 = 8

x1 - 3x2 + x4 = 5

I reduced it as far as

1 -5 0 1 5

0 -8 -1 0 2

0 0 0 0 0

But I cant seem to get it into row echelon form. I tried dividing the 2nd row in half and subtracting (-1) of the top row.

but then I get this

1 -5 0 1 5

-1 1 -1/2 -1 -3

0 0 0 0 0

This is my first week taking linear algebra so I guess its expected to run into trouble like this.