Homework Help: Solving for x with natural logs

1. Aug 26, 2007

Ry122

Hi
Im having difficulty solving for x in this equation.
5=9ln(x+4)
I have no idea where to start so i can't show u any working.

2. Aug 26, 2007

rocomath

can you show at least one step? there is at least one very easy step that you could do.

question: if i ask u to find ln(x+2) = 3, how can you get rid of ln?

Last edited: Aug 26, 2007
3. Aug 26, 2007

gezz

Take another look and don't get bogged down in details until youve done some basic simplification. Work from the outside in and you should be able to rearrange this into something you're much more happy to deal with.

Roco covered it pretty well when he told you there was one easy step you could do =-)

4. Aug 27, 2007

Ry122

raise e to the power of 3?

5. Aug 27, 2007

rocomath

yep

$$\exp^{\frac{5}{9}}=(x+4)$$

now just solve for x