Question 1174266
<pre>
ONE SIDE             2x
SECOND SIDE           x
THIRD SIDE           x-9
</pre>
You could try to answer a question, What are the lengths of a possible triangle segments if enough information is given.  Triangle Inequality Theorem;


{{{system(2x+x>x-9,x+x-9>2x,2x+x-9>x)}}}

-

{{{system(2x>-9,-9>0,2x-9>0)}}}


{{{system(x>-9/2,-9>0,2x>9)}}}


{{{system(x>-9/2,-9>0,x>9/2)}}}
The given information seems to be troubling; maybe recheck your given problem description.