Solve - 3 less than / equal to n + 6 less than / equal to 7

If I understand what you are trying to ask, and your solving for n

It would be - 9==< : means less than or equal to

I think it could be - 2, - 1, and 1

Any other positive number greater than 1 makes it false.

-2 + 6 = 4

-1 + 6 = 5

1 + 6 = 7

All of these make the statement true because 4, 5, and 7 are all greater than - 3 and less than 7, and 7 is equal to 7.