Answer:
x = -1/2 or x = (2 i π n)/log(36) - 1/2 for n element Z
not sure what you needed but I gave both solutions.
Explanation:
Solve for x over the real numbers: 
216 = 36^(1 - x) 
 
216 = 36^(1 - x) is equivalent to 36^(1 - x) = 216: 
36^(1 - x) = 216 
 
Take reciprocals of both sides: 
36^(x - 1) = 1/216 
 
Take the logarithm base 36 of both sides: 
x - 1 = -3/2 
 
Add 1 to both sides: 
Answer: x = -1/2
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Solve for x: 
216 = 36^(1 - x) 
 
216 = 36^(1 - x) is equivalent to 36^(1 - x) = 216: 
36^(1 - x) = 216 
 
Take reciprocals of both sides: 
36^(x - 1) = 1/216 
 
Take the logarithm base 36 of both sides: 
x - 1 = (2 i π n)/log(36) - 3/2 for n element Z 
 
Add 1 to both sides: 
Answer: x = (2 i π n)/log(36) - 1/2 for n element Z