SOLUTION: Solve the matrix: [1 2 1 | 0] [0 1 0 |-2] [0 0 1 | 3] Thanks in advance

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Question 638556: Solve the matrix:
[1 2 1 | 0]
[0 1 0 |-2]
[0 0 1 | 3]
Thanks in advance
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Solve the matrix:
[1 2 1 | 0]
[0 1 0 |-2]
[0 0 1 | 3]
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The 3rd row --> z = 3
The 2nd row --> y = -2
---
x + 2*-2 + 3 = 0
x = 1