a property of logs, is
log ab=log a+log b so
log 23+log 93=log (23 times 93)=log 2139
assuming log to base 10 you would be solving for
10^x=2139
this is the same as
log 2139
not sure how to solve it except by puting it into a calculator or looking it up on a log table
the answer is aprox 3.3302107845715