Solve the System A) $\left\{ \left( - \frac { 1 } { 7 } , - \frac { 1 } { 3 } , - \frac { 1 } { 7 } \right) \right\}$

Multiple Choice

Solve the system.
- $\begin{array}{l}\frac{8}{x}-\frac{1}{y}+\frac{3}{z}=-\frac{8}{21} \\-\frac{1}{x}+\frac{5}{y}-\frac{8}{z}=-\frac{8}{3} \\\frac{6}{x}-\frac{1}{y}-\frac{1}{z}=-\frac{2}{3}\end{array}$

A) $\left\{ \left( - \frac { 1 } { 7 } , - \frac { 1 } { 3 } , - \frac { 1 } { 7 } \right) \right\}$
B) $\left\{ \left( - \frac { 1 } { 7 } , - \frac { 1 } { 3 } , \frac { 1 } { 7 } \right) \right\}$
C) $\{ ( - 7 , - 3 , - 7 ) \}$
D) $\{ ( - 7 , - 3,7 ) \}$