Question 985873
Let the numbers be N, N+1, and N+2

You are told 
{{{3*(N + (N+1)) = (N+2) - 49}}}
{{{3*(2N +1) = N - 47}}}
{{{6N + 3 = N - 47}}}
{{{5N = - 50}}}
{{{N = -10}}}
Check your answer.