Im quite stuck on starting this problem. I feel totally useles at doing all show that questions, unfortunately they are the hardest question for me and this is no different:

Do I assume that $\displaystyle log_a$ is $\displaystyle log _{10}$?Given that $\displaystyle Log_a x= 2log_a 6 - log_a 3$, show that $\displaystyle x=12$

Im am actually very stuck, so any help would be greately appreciated kind people

Thanks