Solve the Equation $\frac { x + 3 } { 3 } + 7 = \frac { x - 3 } { 3 }$

Solve the equation. $\frac { x + 3 } { 3 } + 7 = \frac { x - 3 } { 3 }$

A) $\{ 10.5 \}$
B) $\{ - 9.5 \}$
C) $\{ - 10.5 \}$
D) $\{ 11.5 \}$
E) $\varnothing$