SOLUTION: Please help me to solve this xm2ya3z=5,4xa3ya4z=7,xaymz=m4,sir here a=add,m=minus

Algebra ->  Matrices-and-determiminant -> SOLUTION: Please help me to solve this xm2ya3z=5,4xa3ya4z=7,xaymz=m4,sir here a=add,m=minus       Log On


   

Question 879786: Please help me to solve this xm2ya3z=5,4xa3ya4z=7,xaymz=m4,sir here a=add,m=minus
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
x-2y%2B3z=5
4x%2B3y%2B4z=7
x%2By-z=-4
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Use Cramer's rule,
A=%28matrix%283%2C3%2C1%2C-2%2C3%2C4%2C3%2C4%2C1%2C1%2C-1%29%29
abs%28A%29=-20
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abs%28A%5Bx%5D%29=-20
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abs%28A%5By%5D%29=-20
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abs%28A%5Bz%5D%29=-20
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x=abs%28A%5Bx%5D%29%2Fabs%28A%29=40%2F%28-20%29=-2
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y=abs%28A%5By%5D%29%2Fabs%28A%29=-20%2F%28-20%29=1
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z=abs%28A%5Bz%5D%29%2Fabs%28A%29=-60%2F%28-20%29=3