Question 1133718
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 the middle digit is equal to the <s>number</s> SUM of the other two. 
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Original Number  {{{100h+10t+u}}}



Description Gives  {{{system(h+t+u=14,t=h+u,h+10t+100u-(100h+10t+u)=99)}}}


Simplify:
{{{system(h+t+u=14,t=h+u,u=h+1)}}}


Replace h+u with t in digit sum equation.
{{{system(t+t=14,h=h+1)}}}


{{{highlight_green(t=7)}}}



Revise the system:
{{{system(h+u=7,u=h+1)}}}


{{{h+(h+1)=7}}}
{{{h+h+1=7}}}
{{{2h=6}}}
{{{highlight_green(h=3)}}}


Again, digit-sum equation:
h+t+u=14
{{{3+7+u=14}}}
{{{u+10=14}}}
{{{highlight_green(u=4)}}}



Original Number:   374