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Solve the System −3x−y+9z=579x+7y−7z=13−5x−5y+z=−37\begin{array} { l } - 3 x - y + 9 z = 57 \\9 x + 7 y - 7 z = 13 \\- 5 x - 5 y + z = - 37\end{array}

Question 412

Multiple Choice

Solve the system.
- −3x−y+9z=579x+7y−7z=13−5x−5y+z=−37\begin{array} { l } - 3 x - y + 9 z = 57 \\9 x + 7 y - 7 z = 13 \\- 5 x - 5 y + z = - 37\end{array}


A) {(−3,6,6) }\{ ( - 3,6,6 ) \}
B) {(3,8,6) }\{ ( 3,8,6 ) \}
C) {(3,6,8) }\{ ( 3,6,8 ) \}
D) ∅\varnothing

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