Answer:
It is enormously necessary for each individual to be able to find a balance between their freedoms and their responsibilities, in such a way that with their freedoms individuals do not affect the freedoms and rights of others. Thus, each person must exercise his freedom in a responsible way, and it is his responsibilities precisely those that limit the freedom of individuals. In this way, for example, work, family and academic responsibilities limit the freedoms of the individual, and put him in a framework of self-regulation along with the rest of the individuals, who are in the same situation.
DOB = DOE + EOA + AOB
180 = 60 + 90 + AOB
==> AOB =30
