An object with a charge of -4.0 µC is 0.45 m from a second object and experiences an repulsive force of 1.80 N. What is the magnitude of the charge on the second object?

So how would i start this one i have a formula but it is not for finding one of the 2 charges.

Question

An object with a charge of -4.0 µC is 0.45 m from a second object and experiences an repulsive force of 1.80 N. What is the magnitude of the charge on the second object? 

So how would i start this one i have a formula but it is not for finding one of the 2 charges.

anonymous · Answer

F=kq1q2/r2

anonymous · Answer

Would i just have to do k X q1 / r2?

vincent-lyon.fr · Answer

It is a simple equation.

Solve it for q2.