What is n?

We have a division. The result is 0. One part of this division should be 0. Logically $(2014 \times 2013-2012 \times 2011)$ cannot be 0 because we can't divide by 0. $( 2 \times n-2014)$ is equals 0. Thus $n=1007$ .

$\frac{2n-2014}{2014\times2013-2012\times2011}=0$

Multiply both sides by $2014\times2013-2012\times2011$ :

$2n-2014=0$

Add 2014 to both sides:

$2n=2014$

Divide both sides by two:

$n=1007$

In the rule 0/n as such that n is not equal to 0 , we need to turn the first group of numbers as 0. Solving for n, it should be 1007.