Solve the Equation $$1 - \frac { 5 } { 7 x } = \frac { 2 } { 10 }$$

Solve the equation.
- $$1 - \frac { 5 } { 7 x } = \frac { 2 } { 10 }$$

A) $\left\{ - \frac { 25 } { 4 } \right\}$
B) $\left\{ \frac { 25 } { 28 } \right\}$
C) $\left\{ - \frac { 25 } { 28 } \right\}$
D) $\{ - 50 \}$