Solved

Solve
- $\begin{array} { c } 7 x + 7 y + z = 1 \\x + 8 y + 8 z = 8 \\9 x + y + 9 z = 9\end{array}$

Question 22

Multiple Choice

Solve.
- $\begin{array} { c } 7 x + 7 y + z = 1 \\x + 8 y + 8 z = 8 \\9 x + y + 9 z = 9\end{array}$

A) $( 0,1,0 )$
B) $( 1 , - 1,1 )$
C) $( - 1,1,1 )$
D) $( 0,0,1 )$

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