How do you solve 9^(x-4)=81? Precalculus Solving Exponential and Logarithmic Equations Logarithmic Models 1 Answer Alan P. Feb 12, 2015 9^(x−4) = 81 implies x = 6 The only value p for which 9^p = 81 is p = 2 so x-4 = 2 rarr x=6 Answer link Related questions What is a logarithmic model? How do I use a logarithmic model to solve applications? What is the advantage of a logarithmic model? How does the Richter scale measure magnitude? What is the range of the Richter scale? How do you solve logx+log(x+15)=2? How do you solve the equation 2 log4(x + 7)-log4(16) = 2? How do you solve 2 log x^4 = 16? How do you solve 2+log_3(2x+5)-log_3x=4? How do you solve 3^x=14? See all questions in Logarithmic Models Impact of this question 19245 views around the world You can reuse this answer Creative Commons License