Question 67972
The numbers are 
2n+1
2n+3 
2n+5
{{{9(2n+1) = 3(2n+3) + 4(2n+5)}}}
{{{18n + 9 = 6n + 9 + 8n + 20}}}
{{{4n = 20}}}
{{{n = 5}}}
The numbers are
{{{2n + 1 = 11}}}
{{{2n + 3 = 13}}}
{{{2n + 5 = 15}}}