A charge of 6.50 ✕ 10-9 C and a charge of -4.00 ✕ 10-9 C are separated by a distance of 0.6 m...?

A charge of 6.50 ✕ 10-9 C and a charge of -4.00 ✕ 10-9 C are separated by a distance of 0.6 meters. Find the position at which a third charge, of 11.0 ✕ 10-9 C, can be placed so that the net electrostatic force on it is zero. I thought you solved this the same way as you would if you were solving this problem... show more A charge of 6.50 ✕ 10-9 C and a charge of -4.00 ✕ 10-9 C are separated by a distance of 0.6 meters.
Find the position at which a third charge, of 11.0 ✕ 10-9 C, can be placed so that the net electrostatic force on it is zero.

I thought you solved this the same way as you would if you were solving this problem with a unknown test charge but that wasn’t true. So how do you solve it lol
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