Question 270420
<pre><font size = 4 color = "indigo"><b>
We have this system:

{{{system(t=h-1,t=u+2,h+t+u=20)}}}

Solve that and get h= 8, t=7, and u=5

So the number is  875.

You didn't need to be given that it is odd.

Edwin</pre>