To find out how many students came to LiveLesson on Friday, we can set up the following equation:
Let \( x \) be the number of students who came to LiveLesson on Friday.
According to the problem, we know:
- The number of students on Tuesday is 115.
- On Friday, there were 16 more students than on Tuesday.
So we can write the equation:
\[ x = 115 + 16 \]
Now, we can solve the equation:
\[ x = 115 + 16 = 131 \]
Thus, the number of students who came to LiveLesson on Friday is \( \boxed{131} \).