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Solve the System by Using the Inverse of the Coefficient −3x−y−6z=−549x+4y−7z=652x−9y+z=−5\begin{array} { l } - 3 x - y - 6 z = - 54 \\9 x + 4 y - 7 z = 65 \\2 x - 9 y + z = - 5\end{array}

Question 108

Multiple Choice

Solve the system by using the inverse of the coefficient matrix.
- −3x−y−6z=−549x+4y−7z=652x−9y+z=−5\begin{array} { l } - 3 x - y - 6 z = - 54 \\9 x + 4 y - 7 z = 65 \\2 x - 9 y + z = - 5\end{array}


A) {(−9,3,18) }\{ ( - 9,3,18 ) \}
B) ∅\varnothing
C) {(9,3,4) }\{ ( 9,3,4 ) \}
D) {(9,4,3) }\{ ( 9,4,3 ) \}

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