SOLUTION: solve the sytem: 2x + y - z = 10 6x + 5y - 2z = 23 3x - y + z = 5

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Question 329974: solve the sytem:
2x + y - z = 10
6x + 5y - 2z = 23
3x - y + z = 5
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
[A]=%28matrix%283%2C3%2C2%2C1%2C-1%2C6%2C5%2C-2%2C3%2C-1%2C1%29%29
[b]=%28matrix%283%2C1%2C10%2C23%2C5%29%29
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det[A]=15
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[A]inv=-%281%2F15%29%2A%28matrix%283%2C3%2C-3%2C0%2C-3%2C12%2C-5%2C2%2C21%2C-5%2C-4%29%29
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[x]=[A]inv[b]
[x]=%28matrix%283%2C1%2C3%2C-1%2C-5%29%29
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%28matrix%283%2C1%2Cx%2Cy%2Cz%29%29=%28matrix%283%2C1%2C3%2C-1%2C-5%29%29