Solve the Equation $$\frac { 1 } { 5 } ( r + 6 ) = \frac { 1 } { 7 } ( r + 8 )$$

Solve the equation.
- $$\frac { 1 } { 5 } ( r + 6 ) = \frac { 1 } { 7 } ( r + 8 )$$

A) $- 1$
B) 2
C) $- 2$
D) 1