SOLUTION: i need help with matrices and systems of equations. [1 -7 -1] [2 -3 2] [1 3 -2] ___________ [1 2 -1] [2 3 2] [1 -2 -2] represents the values of which vari

Question 33914: i need help with matrices and systems of equations.
[1 -7 -1]
[2 -3 2]
[1 3 -2]
____________
[1 2 -1]
[2 3 2]
[1 -2 -2]
represents the values of which variable in the solution of the equations below?
x+ 2y - z = -7
2x +3y + 2z = -3
x-2y-2z=3
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!
solving for "y".
Notice that the constant numbers from the equation are
placed in the "y" column.
The denominator is called the "coefficient degerminant".
Cheers,
Stan H.
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