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Solve the System −2x−y+4z=−3−2x+5y−9z=148x−8y+z=−31\begin{array} { l } - 2 x - y + 4 z = - 3 \\- 2 x + 5 y - 9 z = 14 \\8 x - 8 y + z = - 31\end{array}

Question 144

Multiple Choice

Solve the system.
−2x−y+4z=−3−2x+5y−9z=148x−8y+z=−31\begin{array} { l } - 2 x - y + 4 z = - 3 \\- 2 x + 5 y - 9 z = 14 \\8 x - 8 y + z = - 31\end{array}


A) {(1,5,1) }\{ ( 1,5,1 ) \}
B) {(1,1,5) }\{ ( 1,1,5 ) \}
C) ∅\varnothing
D) {(−1,5,2) }\{ ( - 1,5,2 ) \}

Correct Answer:

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