Use the Gauss-Jordan Method to Solve the System of Equations $$\begin{array} { l } 7 x + 7 y = - 42 \\- 4 x - 4 y = 24\end{array}$$

Multiple Choice

Use the Gauss-Jordan method to solve the system of equations. If the system has infinitely many solutions, give the
solution with y arbitrary.
- $$\begin{array} { l } 7 x + 7 y = - 42 \\- 4 x - 4 y = 24\end{array}$$

A) $\{ ( - 6,1 ) \}$
B) $\{ ( - 6,0 ) \}$
C) $\varnothing$
D) $\{ ( - 7,1 ) \}$