Iam thinking of a number x. what algebraic expression represents 7 less than three times this number?

Jermaine has t subway tokens. karen has 4 more subway tokens than jermaine. raul has 5 fewer subway tokens than jermaine. which expression represents the ratio of karen's tokens to raul's tokens

Plz hurry evaluate the expression a+b where a=8 and b=19

With number 11 ( show how you got the answer)