If you add two-thirds of a number to the number itself, you get 40. What is the number?

I do not know how to set it up?

2/3n + n = 40

Solve for n.

I don't know but thak you sooooooooooo much for helping me on my mixed #'s!!!!!!!! Good Luck!!!!!!

I don't know but thak you sooooooooooo much for helping me on my mixed #'s!!!!!!!!(Angelina)Good Luck!!!!!!