Solve the Equation $\varnothing$ B) $\left\{ \frac { 1 } { 2 } \right\}$

Multiple Choice

Solve the equation.
- 3n+2+n=2(2 n+1)

A) $\varnothing$
B) $\left\{ \frac { 1 } { 2 } \right\}$
C) $\left\{ - \frac { 1 } { 2 } \right\}$
D) { $\mathrm { n } \mid \mathrm { n }$ is a real number }