SOLUTION: 4x+2y+z=-1 3x-4y+5z=-13 x+y-3z=7

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Question 948888: 4x+2y+z=-1
3x-4y+5z=-13
x+y-3z=7
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Use Cramer's rule,
A=%28matrix%283%2C3%2C%0D%0A4%2C2%2C1%2C%0D%0A3%2C-4%2C5%2C%0D%0A1%2C1%2C-3%29%29
abs%28A%29=63
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.
A%5Bx%5D=%28matrix%283%2C3%2C%0D%0A-1%2C2%2C1%2C%0D%0A-13%2C-4%2C5%2C%0D%0A7%2C1%2C-3%29%29
abs%28A%5Bx%5D%29=0
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.
A%5By%5D=%28matrix%283%2C3%2C%0D%0A4%2C-1%2C1%2C%0D%0A3%2C-13%2C5%2C%0D%0A1%2C7%2C-3%29%29
abs%28A%5By%5D%29=36
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.
A%5Bz%5D=%28matrix%283%2C3%2C%0D%0A4%2C2%2C-1%2C%0D%0A3%2C-4%2C-13%2C%0D%0A1%2C1%2C7%29%29
abs%28A%5Bz%5D%29=-135
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x=abs%28A%5Bx%5D%29%2Fabs%28A%29=0%2F63=0
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y=abs%28A%5By%5D%29%2Fabs%28A%29=36%2F63=4%2F7
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z=abs%28A%5Bz%5D%29%2Fabs%28A%29=-135%2F63=-15%2F7
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