7 is equal to {7}

Question

i don't understand the question

Answer 1

Is there more information in this question?  The way it is worded, it is saying that the number 7 equals the set whose member is the number 7.

Answer 2

{7} is a solution set.  This means that the solution is 7 and only 7.  No more or no less.  Exactly 7. 

 

Let that sink in.