There is an unknown number of people at the beginning of lunch. Then... Each student had 2 friends come sit with them, tripling the amount.
Then the entire group divided into 5 groups, and all but one group left and went
outside, so only of the total students were left in the lunchroom
3 more people came into the lunchroom
The total number of people in the lunchroom at the end of lunch was 11
.
.
Which of the following equations would help us use the story above to figure out how many
people there were at the beginning of lunch.