I guess it is simplifying the expression:

You know from the given information, there are 20 people in total.
When asked 14 people stated that they liked chocolate. This leaves a group of people out of 20 who do not like chocolate.
20-14=6
You know from this that 6 people do not like chocolate while 14 of them do
Hope I helped :)
In conclusion, 1,155 people went to see a comedy movie.
Answer:
8
Step-by-step explanation:
base x height / 2 = the area
4 x h / 2 = 16
h = 8
so x is 8
Remember order of operations (PEMDAS):
3•(11-1/2)
3•10.5
31.5