Question 1088316
Your number is {{{ABC}}} where each letter is a digit from 0-9.
{{{B=2+C}}}
{{{A=1+B}}}
{{{A+B=3C}}}
Substituting,
{{{(1+B)+B=3(B-2)}}}
{{{2B+1=3B-6}}}
{{{-B=-7}}}
{{{B=7}}}
Now use the other equations to solve for A and C.