Solve the Equation for X $\ln 7 x = 3$ A) $\left\{ \frac { \mathrm { e } ^ { 3 } } { 7 } \right\}$

Multiple Choice

Solve the equation for x. Give an exact solution.
- $\ln 7 x = 3$

A) $\left\{ \frac { \mathrm { e } ^ { 3 } } { 7 } \right\}$
B) $\left\{ \frac { \mathrm { e } ^ { 7 } } { 3 } \right\}$
C) $\left\{ e ^ { 3 / 7 } \right\}$
D) $\{ 21 \}$