Which one of the following points is a solution to the system? $$\begin{array} { l }
- 8 x - 8 y - 5 z = - 6 \
7 x - 8 y - 9 z = 17 \
9 x + 2 y + 6 z = - 1
\end{array}$$
A) $( - 4,1,6 )$
B) $( 1,1 , - 2 )$
C) $( 1,6 , - 10 )$
D) All three points are solutions to the system.

Question

Which one of the following points is a solution to the system? $$\begin{array} { l } 
- 8 x - 8 y - 5 z = - 6 \
7 x - 8 y - 9 z = 17 \
9 x + 2 y + 6 z = - 1
\end{array}$$
A) $( - 4,1,6 )$
B) $( 1,1 , - 2 )$
C) $( 1,6 , - 10 )$
D) All three points are solutions to the system.

Quizplus · Accepted Answer

Substituting $(1, 1, -2)$ into each equation satisfies all three equations, making it a solution to the system.

Which One of the Following Points Is a Solution to the System