Question 987610
You already know most of the number properties you need.

Just #1
{{{-5<=x-9}}}
{{{-5+9<=x-9+9}}}
{{{4<=x+0}}}
{{{highlight(4<=x)}}}


Pure text to show a graph:
<pre>
<====================|=======(=)------------------->
                     0        4

The thick part of line shows included points and the thin part shows excluded points.  The skipped spaces are not intended, but occur through the use of this composition field.
</pre>