Find the nine subtracted from a number equals -15?

-6 
-6-9=-15
just think about what +9 will equal 15 and then you get 6 but you know the 6 has to be negative because thats the only way youll get to -15

9 minus 24 would give you -15 but the 9 would be on top of 24 not on the bottom

Hey mate where is the graph