9514 1404 393
Answer:
 p = 3/4n +3
Explanation:
Expressing the given equation in terms of powers of 3, we have ...
 (27^(n+3))/(81^(p-1)) = 3
 (3^3)^(n+3)/(3^4)^(p-1) = 3^1 . . . . as powers of 3
 3(n +3) -4(p -1) = 1 . . . . . . . . . . . . log base 3 (or, equate exponents)
 3n +9 -4p +4 = 1 . . . . . . . . . . . . . eliminate parentheses
 3n +12 = 4p . . . . . . . . . . . . . . . . add 4p -1
 p = 3/4n +3 . . . . . . . . . . divide by 4