If the equation is n+4/2-3=13 than 'n' will be 28 but how would you get the answer 14?

There's only one number that 'n' can be.
It's called the solution to the equation.

You said                                n  +  4/2  -  3  =  13

Notice that  4/2  is really 2 :    n  +   2    -  3  =  13

Notice that  2 - 3 = -1             n        - 1        =  13

Add 1 to each side:                n                    =  14 .

That's the solution.  'n' is 14 .  It's not 28 .