Help please fast!! geometry coordinates

1. are the triangles similar and if so why? 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

W-16=-12 solve each one step equation plz