1. The problem statement, all variables and given/known data where does the gravity cancel out between the earth and moon? 2. Relevant equations s=3.84405x10^8m earth m = 5.98x10^24kg moon m =7.35x10^22kg G = 6.67x10^-11N m^2/kg^2 mass of object between = 1kg for simplicity F = G x m / r^2 r = ? F earth = F moon G x earth / r^2 = G x moon / (s-r)^2 3. The attempt at a solution I get so far with that and ive ended up with: earth = (moon x r^2) / (s-r)^2 not sure if its right and how do i isolate r?