At what distance from the Earth and the moon have zero net force?

Gardalay

1. The problem statement, all variables and given/known data

At what distance from the Earth will a spacecraft traveling directly from the Earth to the Moon experience zero net force because the Earth and Moon pull with equal and opposite forces?

2. Relevant equations

GM(earth)/(R-d)^2=GM(moon)/d^2

3. The attempt at a solution
Me/Mm=81.3
root 81.3=(R-d)/d

I have no idea how to figure out the rest of the question. Please help.

rock.freak667

(a-b)/c = a/c - b/c

use this and solve

rock.freak667

(a-b)/c = a/c - b/c

use this and solve