SOLUTION: Solve the system of linear equations using a graphing calculator and Cramer's Rule. 6x+4y-8z=-28 -2x+2y+3z=12 -2x+2y-z=0

Algebra ->  Graphs -> SOLUTION: Solve the system of linear equations using a graphing calculator and Cramer's Rule. 6x+4y-8z=-28 -2x+2y+3z=12 -2x+2y-z=0      Log On


   

Question 855781: Solve the system of linear equations using a graphing calculator and Cramer's Rule.
6x+4y-8z=-28
-2x+2y+3z=12
-2x+2y-z=0
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
A=%28matrix%283%2C3%2C6%2C4%2C-8%2C-2%2C2%2C3%2C-2%2C2%2C-1%29%29
abs%28A%29=-40
.
.
A%5Bx%5D=%28matrix%283%2C3%2C-28%2C4%2C-8%2C12%2C2%2C3%2C0%2C2%2C-1%29%29
abs%28A%5Bx%5D%29=-128
.
.
A%5By%5D=%28matrix%283%2C3%2C6%2C-28%2C-8%2C-2%2C12%2C3%2C-2%2C0%2C-1%29%29
abs%28A%5By%5D%29=-8
.
.
A%5Bz%5D=%28matrix%283%2C3%2C6%2C4%2C-28%2C-2%2C2%2C12%2C-2%2C2%2C0%29%29
abs%28A%5Bz%5D%29=-240
.
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x=abs%28A%5Bx%5D%29%2Fabs%28A%29=%28-128%29%2F%28-40%29=16%2F5
.
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y=abs%28A%5By%5D%29%2Fabs%28A%29=%28-8%29%2F%28-40%29=1%2F5
.
.
z=abs%28A%5Bz%5D%29%2Fabs%28A%29=%28-240%29%2F%28-40%29=6