Max is thinking of a number, which he calls n. He adds 8 and then doubles the sum.

and the expression is: 2 (n + 8)
What is max final number if his starting number is 7?

If the starting number is 7, we can plug it into the expression 2(n + 8):

2(7 + 8) = 2(15) = 30.

Therefore, Max's final number is 30.