Will mark BRAINEST!!! Solve for X

Which is equivalent to 10/12? options: 10/18 5/6 3/12 9/11

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

Find the value of x for which line a is parallel to line b