1. The problem statement, all variables and given/known data A positive point charge Q1 = 2.51×10-5C is fixed at the origin of a coordinate system. A second positive charge Q2 = 4.07×10-6C is fixed to the x axis at x = +2.07m. Find the location of the place along the x axis, where the net-force on an arbirary test-charge (positive or negative) between these two charges is zero. 2. Relevant equations Coulomb's Law 3. The attempt at a solution My guess at this problem is to use Coulomb's equation to find where the force is equal to zero or to find the net force of the charges and somehow find where that equals zero. But I mostly need help on where to start with this problem.