Is there a way to use CSS attribute as value?

Question

I mean, is there a way to do something like:

width: 92%;
left: (100-width)/2;

so I can change the width without care with the "left"?

obs. I don't want to know about other ways of doing this centering, like with magins=auto, I just want to know if I can use an css attribute as a value to other attribute. Thanks! :)

Answer 1

Not in pure CSS, no.

CSS precompilers like LESS offer it, though.