I'm having a real problem understanding logarithmic equations. Especially a certain area where you have to approximate values with given logarithms. I don't even really understand what I'm talking about.

For example:

If find the approximate value of log3 8.

I've only been shown how to solve a problem like this that has an 'approximate value' that's a convenient multiple of the product of the two logarithms. Or one of the two logarithms can square itself and then conveniently go into it. I really don't get how to solve this one.

Also, I'm trying to figure out how to do this one:

Solve 10x= 152x.

log 10x= log 152x

x log 10 = 2x log 15

??