Identify Systems That Do Not Have Exactly One Ordered-Pair Solution $$\frac { x } { 3 } + \frac { y } { 3 } = 0$$

Multiple Choice

Identify Systems That Do Not Have Exactly One Ordered-Pair Solution
- $$\frac { x } { 3 } + \frac { y } { 3 } = 0$$
$x - y = - 8$

A) $\{ ( - 4,4 ) \}$
B) $\{ ( - 5,5 ) \}$
C) $\{ ( x , y ) \mid x - y = - 8 \}$
D) $\varnothing$