Explain the process of solving the following equation: 4^x - 2 = 20

This is an exponential equation:  4^x - 2 = 20.  First thing:  combine the -2 and the 20:  4^x = 22.

Next, take the logarithm (natural or common log) of both sides.  We get:

                                            log 22
x log 4 = log 22.  Then x =   (answer).  You could, of course, evaluate
                                            log 4       this on a suitable calculator.

Hi,


ln means natural log (neper's log)