One hundred students go to the cafeteria to eat lunch. Six tables held the same amount of students while an additional 10 students stood in line. Which equation can be used to find the number of students sitting at each table?
1. 100 + 6 x = 10
2. 100 = 10 x + 6
3. 10 x - 100 = 10
4. 6x + 10 = 100