I've been asked to solve the following matrix and find the solutions but I'm not sure if I've reached the correct 'end' matrix.(adsbygoogle = window.adsbygoogle || []).push({});

Original matrix:

1 2 -1 3

-1 3 4 10

-1 1 -2 8

The last matrix I got after my calculations:

1 2 -1 3

0 1 1 11/3

0 0 8 26/3

Thanks for reading

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# Matrix help!

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