Can someone give me a hint/explain how to show this inclusion? $A,B$ are subsets of a topological space. If $x \in A$, showing that $x \in \overline{A - B}$ is obvious, but I'm not sure how to show that if $x$ is in the boundary of $A$, then $x \in \overline{A - B}$
By $\overline A$, I mean closure of $A$.