What value is x?

Algebra has made  an impression
The opposite of a depression
What value is X
Is it something like Sex?
Bring back the days of repression

Topology  is hard to explain
Rubber sheets,  here’s geometry again
Would it be better
To write you a letter
As long a I show no disdain

Doing the tax form is hard
What income  have I ever declared?
I do have my pension
Will I get detention
For spending it all  at the Fair?

I see an equation go by
I   say, never focus your eye
Or  you may try to solve it
Or even dissolve it
I’m truthful; I never tell lies