Solve the Equation $$9 ^ { x - 7 } = 27 ^ { x + 5 }$$

Multiple Choice

Solve the equation. Do not use a calculator. $$9 ^ { x - 7 } = 27 ^ { x + 5 }$$

A) $x = - 17$
B) $x = 12$
C) $x = - 11$
D) $x = - 29$
E) no solution exists