Natural Logarithms question(s)?

Solve each equation. Use properties of logarithms to simplify each as needed:

1.) e^x=3

2.) e^2x - 6=5 (minus 6 is not in the exponent)

3.) 5e^6x=12

4.) e^3x/4=4 (3x/4 is all in the exponent)

Please help by solving and explaining. Thanks