SOLUTION: find the inverse of the matrix below using an echelon method 6 5 3 8 4 5 7 6 3

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Question 979553: find the inverse of the matrix below using an echelon method
6 5 3
8 4 5
7 6 3
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!

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Replace R2 with R1%2A8-R2%2A6 and R3 with R1%2A7-R3%2A6,

Replace R3 with R2%2BR3%2A16,

Replace R1 with 16%2AR1-5%2AR2,

Replace R2 with 7%2AR2%2BR3,

Replace R1 with 7%2AR1-13%2AR3,

So now,

Simplifying,

and the inverse is,