Question 123379
your answer is correct.....
   
{{{n+2(7+3n)-3n = n + 14 + 6n - 3n= 4n + 14}}}

which has the same value:
{{{2(7+n)=14 + 2n}}}
{{{n+14}}}
{{{14+3n}}}
{{{2(7+2n)= 14 + 4n}}}
{{{21n-3n}}}

 answer is {{{2(7+2n)= 14 + 4n}}}