Does post/pre increment/decrement work the same in all languages and do they even exist in all languages?

Question

x = 5
y = 7
z = x++ + --y
I understand that x is updated after evaluating z and y is updated during evaluation in C++, is it the same in all languages?
Does x and y retain the updated value just like in C++, especially with pre increment/decrement which I had trouble understanding!

Answer 1

Some results depend on the language.
{x= ++x + ++x + ++x ;}is the same in cpp and cs
however
{x += ++x;} gives a different result

Answer 2

Take a look at my answer here, it might be related to your question: https://www.sololearn.com/Discuss/157809/pre-and-post-increment

Answer 3

no post/prefer increment/decrement in Python, just do +=1