Question 1003856
Row Operation	

{{{matrix(3,4,1,0,0,300,0,1,3,1300,-1,0,1,250)}}} 
	
1:  add 3 times the 1st row to the 2nd row and you will have

{{{matrix(3,4,1,0,0,300,0,1,3,1300,-1,0,1,250)}}}
 

2: add 1 times the 1st row to the 3rd row and you will have
	
{{{matrix(3,4,1,0,0,300,0,1,3,1300,0,0,1,550)}}}


3:  add -3 times the 3rd row to the 2nd row and you will have

{{{matrix(3,4,1,0,0,300,0,1,0,-350,0,0,1,550)}}}
 
and, next one:

{{{matrix(3,4,1,-4,2,200,-2,9,-4,400,1,-4,3,100)}}}

add 2 times the 1st row to the 2nd row and you will get

{{{matrix(3,4,1,-4,2,200,0,1,0,800,1,-4,3,100)}}}

add -1 times the 1st row to the 3rd row and you will get

{{{matrix(3,4,1,-4,2,200,0,1,0,800,0,0,1,-100)}}}

add -2 times the 3rd row to the 1st row and you will get

{{{matrix(3,4,1,-4,0,400,0,1,0,800,0,0,1,-100)}}}

 
add 4 times the 2nd row to the 1st row and you will get


{{{matrix(3,4,1,0,0,3600,0,1,0,800,0,0,1,-100)}}}