Hey there!!
In order to solve this question we will need to use the distributive property of numbers.
30 = -5 ( 6n + 6 )
Now distribute -5 with 6n and 6
30 = -30n - 30
Add 30 on both sides
60 = -30n
Divide by -30 on both sides
60 / -30 = n
- 2 = n
Hence, the value of n = -2
Hope my answer helps!