$\left\{ \begin{array} { r }
7 x + 7 y + z = 1 \
x + 8 y + 8 z = 8 \
9 x + y + 9 z = 9
\end{array} \right.$
A) x=1, y=-1, z=1
B) x=-1, y=1, z=1
C) x=0, y=0, z=1
D) x=0, y=1, z=0

Question

$\left\{ \begin{array} { r } 
7 x + 7 y + z = 1 \
x + 8 y + 8 z = 8 \
9 x + y + 9 z = 9
\end{array} \right.$
A)  x=1, y=-1, z=1 
B)  x=-1, y=1, z=1 
C)  x=0, y=0, z=1 
D)  x=0, y=1, z=0

Quizplus · Accepted Answer

The Answer of $\left\{ \begin{array} { r } 
7 x + 7 y + z = 1 \
x + 8 y + 8 z = 8 \
9 x + y + 9 z = 9
\end{array} \right.$
A)  x=1, y=-1, z=1 
B)  x=-1, y=1, z=1 
C)  x=0, y=0, z=1 
D)  x=0, y=1, z=0

{7x+7y+z=1x+8y+8z=89x+y+9z=9\left\{ \begin{array} { r } 7 x + 7 y + z = 1 \\x + 8 y + 8 z = 8 \\9 x + y + 9 z = 9\end{array} \right.⎩⎨⎧​7x+7y+z=1x+8y+8z=89x+y+9z=9​

$\left\{ \begin{array} { r } 7 x + 7 y + z = 1 \\x + 8 y + 8 z = 8 \\9 x + y + 9 z = 9\end{array} \right.$