Answer:
8
Step-by-step explanation:
6^7 : 6^6 = 6^(7-6) = 6^1 = 6
3^3 : 3^4 = 3^(3-4) = 3^-1 = 1/3
6* 1/3 = 2
2^3 = 8
n = 5.5
4n - 10 = 12
4n = 12 + 10
4n = 22
n = 22/4