Okay so just to verify-
if we use 8mm, we're looking at the charges being 32mm and 8mm away from this new charge, and with the 6mm charge being 30mm and 6mm charge, but we want them to be 6mm because we want a 4x charge separation because their charge differential is only 4x, and because of that, if their charge separation is larger, the electric field will not be equal between them?
I stared at this intermittently throughout the day yesterday and it took me a while to actually ~see~ it and if I saw this on my actual MCAT I don't think I would've been able to figure it out, lol, how did you guys approach this - just knowing the equation and understanding the field relationship??