Can't figure it out. I know that log base 2 24+log base 2 3 is the same as log base 2 72 but here it's minus so does it mean division?

log_{2} 24 - log _{2} 3 = log_{5} x

Note that the left side can be written as

log_{2} (24/3) = log_{2} 8 = 3

So

3 = log_{5} x

This says that 5^3 = x = 125