Matrix question (comments).

Question

anonymous · Answer

I solved this matrix using G-J elemination. And my final answer was  1    0   0  68/37
                                                                                                   0    1    0   72/37
                                                                                                   0     0    1     -50/37


According to an online calculator, I am wrong. In the second step I did: R2= R3+R2. The calculator did R2 = -1R1+R2. This made our answers vary. Why did it do it?

anonymous · Answer

The problems matrix is in the picture, the one in text is my answer.

anonymous · Answer

1   0   0  68/37
0    1  0    72/37
0   0   1     -50/37          is what I got.