Solve the System by the Substitution Method $x y = 1$

Multiple Choice

Solve the system by the substitution method.
- $x y = 1$ $48 x - y = - 2$

A) $\left\{ \left( - 6 , - \frac { 1 } { 6 } \right) , \left( 8 , \frac { 1 } { 8 } \right) \right\}$
B) $\{ ( 6 , - 6 ) , ( - 8,8 ) \}$
C) $\left\{ \left( - \frac { 1 } { 6 } , - 6 \right) , \left( \frac { 1 } { 8 } , 8 \right) \right\}$
D) $\left\{ \left( \frac { 1 } { 8 } , 8 \right) \right\}$