Can sb help me with math

Can i get some on 18,20,& 22? or one of them

What is 20+(5 x 2/5 )+ 3 show your work

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=