Hello, I'm trying to solve a problem, but I'm doing something wrong. This is the problem out of my Physics book, but the problem I'm working on has different numbers, so any help will not be cheating, I just need to know the process. Problem: Two objects are attracted to each other gravitationally with a force of 2.5e-10 N when they are 0.25 meters apart. Their total mass is 4.0 kg. Find their individual masses. Answer: I know the answer is m1=3.9kg, and m2=0.1kg. But I don't know how they got this answer. Help please.