Find the nth term of the following sequences

Question 1:

19,17,15,13,11
21−2n

Question 2:

0,-10,-20,-30,-40
10−10n

Question 3:

18,12,6,0,-6
24−6n

Question 4:

0,7,14,21,28
7n−7

Question 5:

5,10,15,20,25
5n

Question 6:

34,22,10,-2,-14
46−12n