How to do this question plz answer ​

James is playing his favorite game at the arcade. after playing the game 3 times, he has 8 tokens remaining. he initially had 20 tokens, and the game costs the same number of tokens each time. the number t of tokens james has is a function of g, the number of games he plays. write the function’s formula? t=

Pls brainliest will be awarded if answer is correct

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test