Solve the System of Equations by the Substitution Method $$\begin{array} { l } y = 2 x - 6 \\y = 7 x - 7\end{array}$$

Multiple Choice

Solve the system of equations by the substitution method.
- $$\begin{array} { l } y = 2 x - 6 \\y = 7 x - 7\end{array}$$

A) $\{ ( 1 , - 4 ) \}$
B) $\left\{ \left( \frac { 1 } { 5 } , - \frac { 28 } { 5 } \right) \right\}$
C) $\left. \left\{ - \frac { 28 } { 5 } , \frac { 1 } { 5 } \right) \right\}$
D) $\varnothing$