SOLUTION: i need help with matrices and systems of equations. [2 -1 1] [1 2 6] [3 -1 2] ___________ [2 -1 -2] [1 2 3] [3 -1 -1] represents the values of w

Question 33915: i need help with matrices and systems of equations.
[2 -1 1]
[1 2 6]
[3 -1 2]
____________
[2 -1 -2]
[1 2 3]
[3 -1 -1]
represents the values of which variable in the solution of the equations below?
2x- y + z = -2
x +2y + 6z = 3
3x -y + 2z=-1
a) x
b) y
c) z
d) none of the variables
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
None of the variables. You would be solving for Z if
the numerator matrix and the denominator matrices were
switched.
Cheers,
Stan H.
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