In this problem, we are given the information that the rule is to add 6 to n (the position). With this in mind, we can set up a series of equations to solve:
Where n = 1: 1 + 6 = 7, so 7 would go in the first box.
Where n = 2: 2 + 6 = 8, so 8 would go in the second box.
Where n = 3: 3 + 6 = 9, so 9 would go in the third box.
This pattern can be continued for other positional values as well!