Question 549621
{{{(matrix(3,4,1,-2,3,-1,2,-1,2,2,3,1,2,3))}}} Add (-2) times row 1 to row 2, (-3) times row 1 to row 3 to get
{{{(matrix(3,4,1,-2,3,-1,0,3,-4,4,0,7,-7,6))}}} Combine 3 times row 3 plus (-7) times row 2 and replace row 3 with the result.
{{{(matrix(3,4,1,-2,3,-1,0,3,-4,4,0,0,7,-10))}}} Divide row 3 by 7
{{{(matrix(3,4,1,-2,3,-1,0,3,-4,4,0,0,1,-10/7))}}} Add 4 times row 3 to row 2
{{{(matrix(3,4,1,-2,3,-1,0,3,0,-12/7,0,0,1,-10/7))}}} Divide row 2 by 3
{{{(matrix(3,4,1,-2,3,-1,0,1,0,-4/7,0,0,1,-10/7))}}} Add 2 times row 2 and (-3) times row 3 to row 1
{{{(matrix(3,4,1,0,0,15/7,0,1,0,-4/7,0,0,1,-10/7))}}}