SOLUTION: help! When I put this into my calculator it said "0" solve for x 7e^5x=125 I put in 7 2nd Ln ^(5x)=125 (into a TI 83) what am I doing wrong? What should the answer be?

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: help! When I put this into my calculator it said "0" solve for x 7e^5x=125 I put in 7 2nd Ln ^(5x)=125 (into a TI 83) what am I doing wrong? What should the answer be?      Log On


   



Question 111897: help!
When I put this into my calculator it said "0"
solve for x
7e^5x=125
I put in 7 2nd Ln ^(5x)=125 (into a TI 83) what am I doing wrong?
What should the answer be?

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
not sure about TI 83 keystrokes...

dividing by 7 gives e^(5x)=125/7

taking natural log gives 5x=ln(125/7)

dividing by 5 gives x=(ln(125/7))/5