If e3x=8e^{3x} = 8e3x=8, solve for xxx.
x=ln2x = \ln 2x=ln2
x=3ln8x = \frac{3}{\ln 8}x=ln83
x=ln8/3x = \ln 8 / 3x=ln8/3
x=ln(8/3)x = \ln(8/3)x=ln(8/3)