How do i write m is the set of integers that are greater than negative one and less than four

What is the value of x? 3x + (6x - 6) = 4(2x-2)

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

Ineed in figuring out this problem.