What is n plus 2?

if you are doing the "pattern N soloution" it is like a pattern. ex.) 2,4,6,8... you take how much they're adding (2) and that is your first number, you add N for your other #'s you'd multiply it by.(2n) then you subtract the first # in your equasion (2) from the first # in the pattern (2) so 2- 2 = 0 therefore, your anwser would be 2n + 0= _