algebra
posted by jake .
4/9n+6=4/3

too ambiguous
do you mean ..
4/(9n+6)=4/3 or
4/(9n)+6=4/3 or
(4/9)n+6=4/3 ?? 
(4/9)n+6=4/3

in that case just multiply each term by 9, the lowest common denominator to get
4n + 54 = 12
I am sure you can take it from there. 
10 1/2

correct