SOLUTION: x+y+-2z=-3 w+2x+-y =2 2w+4x+y+-3z= -2 w+-4x+-7y+-z=-19

Algebra ->  Coordinate Systems and Linear Equations  -> Lessons -> SOLUTION: x+y+-2z=-3 w+2x+-y =2 2w+4x+y+-3z= -2 w+-4x+-7y+-z=-19      Log On


   

Question 903202: x+y+-2z=-3
w+2x+-y =2
2w+4x+y+-3z=
-2 w+-4x+-7y+-z=-19
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Use Cramer's Rule,

abs%28A%29=30
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abs%28A%5Bw%5D%29=-321
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abs%28A%5Bx%5D%29211
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abs%28A%5By%5D%29=41
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abs%28A%5Bz%5D%29=81
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w=abs%28A%5Bw%5D%29%2Fabs%28A%29=-321%2F30
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x=abs%28A%5Bx%5D%29%2Fabs%28A%29=211%2F30
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y=abs%28A%5By%5D%29%2Fabs%28A%29=41%2F30
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z=abs%28A%5Bz%5D%29%2Fabs%28A%29=81%2F30=27%2F10