Answer
x = 0.532
Step-by-step explanation
The question requires that we solve for x, given the equation

To solve this, we will first reduce the expression to having the term with power alone on one side

The next step now is to take the natural logarithms of both sides
Note that taking the natural logarithms of e, gives 1. That is,
In e = 1

3x + 1 = 2.60
3x = 2.60 - 1
3x = 1.60
Divide both sides by 3
(3x/3) = (1.60/3)
x = 0.532
Hope this Helps!!!