SOLUTION: How would you solve the 4x4 w+x+y+z=2, 2w-x-y+2z=7, 2w+3x+2y-z=-2, 3w-2x-y-3z=-2

Algebra ->  Trigonometry-basics -> SOLUTION: How would you solve the 4x4 w+x+y+z=2, 2w-x-y+2z=7, 2w+3x+2y-z=-2, 3w-2x-y-3z=-2      Log On


   

Question 999381: How would you solve the 4x4 w+x+y+z=2, 2w-x-y+2z=7, 2w+3x+2y-z=-2, 3w-2x-y-3z=-2
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Use Cramer's rule,

abs%28A%29=-9+
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abs%28A%5Bw%5D%29=27+
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abs%28A%5Bx%5D%29=-108+
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abs%28A%5By%5D%29=117+
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abs%28A%5Bz%5D%29=-54+
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w=abs%28A%5Bw%5D%29%2Fabs%28A%29=27%2F%28-9%29=-3
.
x=abs%28A%5Bx%5D%29%2Fabs%28A%29=%28-108%29%2F%28-9%29=12
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y=abs%28A%5By%5D%29%2Fabs%28A%29=117%2F%28-9%29=13
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z=abs%28A%5Bz%5D%29%2Fabs%28A%29=%28-54%29%2F%28-9%29=6