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Solve the System of Equations by Using the Inverse of the Coefficient

Question 50

Multiple Choice

Solve the system of equations by using the inverse of the coefficient matrix.
- $\begin{array}{l}x-y+z=-7 \\x+y+z=1 \\x+y-z=-1\end{array}$

A) $(-4,1,4)$
B) $(1,-4,4)$
C) $(-4,4,1)$
D) No inverse, no solution for system

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