Question 14507
What you want to do is put all the n's on one side, and the other stuff on the other side. 
So, you should get something that looks like this:
{{{5n+4n=17-14}}}
*Remember that everytime you move something across the equal sign, you use the opposite of that number.
Then just solve for N
{{{9n=3}}}
Divide both sides by 9 to get n by itself
{{{n=1/3}}}
Hope this helps!