How to create an empty varaible (with no object) in Python. --- for an algebraic equation... ?

Question

In an algebraic equation, ( like 2x+3y==8. ), variables are expressed before getting their values, through arithmetic algorithms etc., how can I create a statement with such empty varaibles using python3

I'm working on an equation solver programme, so how can I create such empty variables without error

Answer 1

Use 1 '=' sign. Or use None

Answer 2

For string:

string = ''

For number:

number = 0

Answer 3

First one is a string variable. Second one is an integer

Answer 4

Thomas Williams,
Are these string, numbers variables ?

Answer 5

But Thomas Williams, I need an integer with no value, but jere it has a value 0

If I make an expression like,
2x == 10

Since x will have a value 0, I can't get 5 as x here.

Hope you understand the stances and help me !!!