If a sentence contains "as + adj. + as", what does it mean?

I read a lot of this sentences:

"as soon as" , "as well as" , "as much as" ... etc

What do they mean?

They mean equally soon/well/much/etc:

I will leave as soon as I am ready means that Departure and readiness will occur equally soon, i.e. at the same time.
I like sushi as well as sashimi means that I like both equally.
I get as much as 5000 yen a lesson means that my salary often equals 5000 yen a lesson.
I got it.

Thanks very much for your assistance.