Question 279285
wow that is a mouthful take it line by line first 
tens digit=T 
units digit=U
{{{t=u-3}}}
{{{n=u+t}}}
{{{2+n=7u}}}
{{{2+u+t=7u}}} substitute and solve
{{{2+u+u-3=7u}}}
{{{2u-1=7u}}}
{{{-1=5u}}}
but -1/5 cant = u so after doing guess and check there are still no numbers that they could be to fit the above question so this question is IMPOSSIBLE.