Find the lengths of the missing sides

The triangles are similar. what is the value of x? 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 tt of tokens james has is a function of gg, the number of games he plays

How do i do this activity, is appreciated