SOLUTION: 2x-5y+7z=12;3x-8y+2z=2;x+y+3z=8 find solution (x,y,z)

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Question 343475: 2x-5y+7z=12;3x-8y+2z=2;x+y+3z=8 find solution (x,y,z)
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
[A]=%28matrix%283%2C3%2C2%2C-5%2C7%2C3%2C-8%2C2%2C1%2C1%2C3%29%29
[x]=%28matrix%283%2C1%2Cx%2Cy%2Cz%29%29
[b]=%28matrix%283%2C1%2C12%2C2%2C8%29%29
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[A][x]=[b]
[x]=[A]inv[b]
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Find the inverse of [A].
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det[A]=60
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[A]inv=%281%2F60%29%2A%28matrix%283%2C3%2C-26%2C22%2C46%2C-7%2C-1%2C17%2C11%2C-7%2C-1%29%29
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[x]=%28matrix%283%2C1%2C5%2F3%2C5%2F6%2C11%2F6%29%29