Assuming the -5 is with the x
You have 3^(x-5) =9
Convert the 9 to base 3: 3^2 = 9
Now you have:
3 ^(x-5) = 3^2
Now solve for exponents:
X-5= 2
Add 5 to both sides:
X = 7
Add five on both sides. Divide both sides by three
Answer: x = 4.66666666667
