Hi. I have an equation problem I need some help with, it has me stumped and I am sure it is something very simple. The problem is:

A number, twice that number and one-fifth of that number are added. The result is 16, what is the number?

I tried and came up with the figure below, which is definitely wrong because the answer just doesn't fit.

n + 2x + (1/5)x = 16

3x + (1/5)x = 16

(3 1/2)x = 16

x=(16)(2/7)

x=4.6

Any help would be greatly appreciated.