What is the simplified form of the equation 4/5n - 1/5 = 2/5n?

A.) n = - 2

B.) n = 4

C.) n = fraction 1 over 2

D.) n = fraction 2 over 3

To answer the given above, multiply the whole equation with least common multiple of the denominators which is 5n. Shown below,

(4/5n - 1/5 = 2/5n) x 5n

4 - 1 (n) = 2

-n = - 2, n = 2

The answer is not among the choices, it could have been letter A except that the constant in A is negative.