2 unit negative chargees and a positive charge +q are along the same

[partho550]

2 unit negative chargees and a positive charge +q are along the same line. what should be the magnitude of charge q and in which position must it be placed so that the three charges remain in equilibrium...

 

[partho550]

where do you think will be the neutral point... will it be along extreme left?? kinda confused!