Answer: x=3
Explanation:
To solve the question 2ln
= 2ln15, first you have to simplify the equation. e cancels out ln (and vice versa), so on the left side of the equation, first simplify it to 2ln(5x).
The 5x comes down from the exponent once the e cancels out the ln.
Next divide both sides by 2. That will leave you with ln(5x) = 2ln(15)
Raise both sides by the power of e. It should look like this:

As said before, e cancels out ln. When this action is done, the numbers/variables left as the exponent become bases.
You should be left with 5x=15.
Divide both sides by 5 to find that the answer is x=3.
The picture attached gives a clearer step-by-step explanation.