Question 1020012
{{{3(N+(N+1))<=13}}}
{{{3(2N+1)<=13}}}
{{{2N+1<=13/3}}}
{{{2N<=13/3-3/3}}}
{{{2N<=10/3}}}
{{{N<=5/3}}}
Since N is an integer you can further simplify by removing the fraction and find the next lowest integer,
{{{N<=1}}}