If the System Has Infinitely Many Solutions, Write the Solution $$\begin{array} { l } 9 x - y - 10 = 0 \\- 18 x + 2 y + 20 = 0\end{array}$$

Multiple Choice

If the system has infinitely many solutions, write the solution set with x arbitrary.
- $$\begin{array} { l } 9 x - y - 10 = 0 \\- 18 x + 2 y + 20 = 0\end{array}$$

A) $\{ ( x , 18 x - 10 ) \}$

B) $\varnothing$

C) $\{ ( x , 9 x - 10 ) \}$

D) $\{ ( x , 10 - 9 x ) \}$