You can put this solution on YOUR website!
If you need interval notation:
(-infinity,-21)
Graph:
<<=======o--------->
-23,-22,-21,-20,-19
Next time it would be helpful if you give us directions, I didn't really know what you wanted. If you aren't doing interval notation or graphing ignore that part for now. If your book uses parenthesis instead of open circles, put ) where the o is in the graph.
Happy Calculating!!!