Question 626199
(1)
h, hundreds digit
t, tens digit
u, ones digit


{{{h=3u+u}}}, "three times more than the units digit"
{{{h+t+u=4}}}


some reworking
{{{system(h=4u,4u+t+u=4)}}}


{{{system(h=4u,t+5u=4)}}}
The only way this makes any sense is that u=0.   This means t=4.
From that, h=0.

010 or 10.
The "number" seems to be a two digit number.  Not three-digit.
I must have missed something.