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## Homework Statement

"Two point charges 2.0cm apart have an electric potential energy -180 microJoules. The total charge is 31 nC. What are the two charges?"

## Homework Equations

V= k * q / r

## The Attempt at a Solution

I understand that V = -180 * 10^-6, k = 9*10^9, r = 0.02m, and the TOTAL q=31*10^-9 C....but what does that leave us to solve, in this equation? I know we need to find the total charge of the both of them individually, but I don't know how to break this equation up to do that. Can anyone help me see this through?