Perform the indicated row operation: 2 −1 −4 7
−1 2 1 −1
3 4 5 5

R3=3R2⇒R3

2 -1 -4 7
-1 2 1 -1

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=