SOLUTION: reduce the matrix in the form of low level: 1 -2 3 -1 2 -1 2 2 3 1 2 3 the answer is supposed to be 1 0 0 15/7 0 1 0 -4/7 0 0 1 -10/7

Question 549621: reduce the matrix in the form of low level:
1 -2 3 -1
2 -1 2 2
3 1 2 3
the answer is supposed to be
1 0 0 15/7
0 1 0 -4/7
0 0 1 -10/7

Answer by KMST(5398) (Show Source): You can put this solution on YOUR website!
Add (-2) times row 1 to row 2, (-3) times row 1 to row 3 to get
Combine 3 times row 3 plus (-7) times row 2 and replace row 3 with the result.
Divide row 3 by 7
Add 4 times row 3 to row 2
Divide row 2 by 3
Add 2 times row 2 and (-3) times row 3 to row 1

RELATED QUESTIONS
Reduce the following matrix to reduced row-echelon form 0 1 3 -1 2 1 0 -2... (answered by richwmiller)

Invert the matrix by computing the adjoint matrix and the determinant: -1 1 3 0 0 (answered by mathie123)

Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars... (answered by CPhill)

The question asks: Solve each system of equations using matrices (row operations).... (answered by stanbon)

Solve the matrix: [1 2 1 | 0] [0 1 0 |-2] [0 0 1 | 3] Thanks in... (answered by Alan3354)

Hi,my name is Natalia. I solved two problems, but I'm not sure that I did it right. I... (answered by venugopalramana)

Find the inverse of the following matrix: 1 0 1 2 -2 1 3 0... (answered by richwmiller)

Perform the indicated row operations, then choose the new matrix. [ 1 1 1 |-1] [-1 2... (answered by Edwin McCravy)


what is the value of this determinant?
{{{abs(matrix(6,6,
1,   1,   1,   1,    (answered by Edwin McCravy)