Here's the silver nitrate + sodium bromide net ionic equation:

AgNO

Ag

And then for the net ionic equation, cancel out ions which are the same on the both sides:

Br

AgNO

_{3}+ NaBr ==> NaNO_{3}+ AgBr (this is the balanced molecular equation)Ag

^{{+}}+ NO_{3}^{{-}}+ Na^{{+}}+ Br^{{-}}==> Na^{{+}}+ NO_{3}^{{-}}+ AgBr (the full ionic equation)....And then for the net ionic equation, cancel out ions which are the same on the both sides:

Br

^{{-}}+ Ag^{{+}}==> AgBr