How do you solve 4^ { x + 4} = 5?

1 Answer
Jul 4, 2017

x = (log 5)/(log 4) - 4

Explanation:

Take logs of both sides:
log(4^(x+4)) = log 5

Bring the power down in front of the log:
(x+4) log 4 = log 5

Divide both sides by log 4 and subtract 4