Solve the Equation $$\left( \frac { 1 } { 3 } \right) ^ { 6 x + 4 } = 9 ^ { x - 3 }$$

Multiple Choice

Solve the equation.
- $$\left( \frac { 1 } { 3 } \right) ^ { 6 x + 4 } = 9 ^ { x - 3 }$$

A) $\left\{ \frac { 5 } { 3 } \right\}$
B) $\left\{ \frac { 1 } { 4 } \right\}$
C) $\left\{ - \frac { 1 } { 7 } \right\}$
D) $\left\{ - \frac { 1 } { 8 } \right\}$