As Grigori noted in his description, the answer is 1. I believe it is easier to see in the following.
Since we have + 14/3 on both sides we can cancel those out by subtracting it from each side, which leaves.
Then we move the leave the variable (n) on the left and move the number to the right side of the equation by adding 3/14 to each side we get
5/7n=1/2+3/14 --> 5/7n=10/14 --> 5/7n=5/7
Which can now be seen to be solvable by multiplying each side by 7/5
7/5*5/7n = 7/5*5/7 --> 1n = 1 --> n=1