Optimizing the use of variables for values ​​that are used only once

I often come across this doubt and I could use some opinions about it. I often use variables for values ​​that are only used once, and I'm not sure if there is a right or wrong way to do this. Is there any agreement on this?

Simple example:

int matches = 10;
int victories = 4;
int defeats = 3;

int ties = (matches - (victories + defeats));
int score = (victories*3 + ties);

      

        
        
        
      

    

Does it have to ties

be removed for it to become that way?

int matches = 10;
int victories = 4;
int defeats = 3;

int score = (victories*3 + (matches - (victories + defeats)));

      

        
        
        
      

    

Despite the silly example, I wondered about this in situations of varying complexity.

I see some pros and cons of using ties

:

Pros:

• Improves readability.
• ties
  
  can be used later if needed
• Simple maintenance

Minuses:

• Less compact code
• Uses more variables
• Using resources unnecessarily

This may just be a situation of personal taste, but let me know how you handle this and why. Thank!