Question 1161044
{{{10t+u}}}, the number


{{{t<u}}}
and 
{{{u-t=1}}}



{{{10t+u=1+5(t+u)}}}


Substituting for u:
{{{10t+t+1=1+5(t+t+1)}}}
{{{11t+1=1+10t+5}}}
{{{11t=10t+5}}}
{{{highlight(t=5)}}}


The Number {{{highlight(highlight(56))}}}