Question 1051700
Simplified form of the system:   {{{system(x=-3,2x-y+2z=-1,x+y+z=4)}}}


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


{{{system(RowOperations,R1,R2-2*R1,R3-R1)}}}


{{{(matrix(3,4,
1,0,0,-3,
0,-1,2,5,
0,1,1,5)
)}}}


{{{NextOperationIs,R1,(-1)R2,R2+R3}}}


{{{(matrix(3,4,
1,0,0,-3,
0,1,-2,-5,
0,0,3,10)
)}}}


I will let YOU do the last row operation.  It should be  add some multiple of row 3 to row 2 to eliminate the coefficient on z.
How do you start with 3 and get 2?
{{{3*v=2}}}
{{{v=2/3}}}
-
Row 3 to be used as  {{{system((2/3)3,(2/3)*10)}}},
{{{system(2,20/3)}}}
-
The operation to do then is to change row 2 according to  {{{R2+(2/3)*R3}}}.


....