What is the net ionic equation of NiBr2+AgNO3?

Ni Br2 + Ag NO3 -> Ni (NO3)2 +
2AgBr

Since the nitrat ion NO3- is soluble, therefore is
aqueous but silver bromide (AgBr) is water insoluble
salt.

We'll separate the aqueous soutions to determine the
net ionic equation and we'll have:

Ni (2+) (aq.) + 2NO3
(aq.) + 2Ag(+)(aq.) + 2Br(-)(aq.) -> Ni (2+) (aq.) + 2NO3 (aq.) + 2AgBr
(salt)

We notice that the repeating ions on both sides are
cancelling out, except 2Ag(+)(aq.) + 2Br(-)(aq.) on the reactant side and 2AgBr (salt)
on the product side, getting the net ionic
equation.

2Ag(+)(aq.) + 2Br(-)(aq.) -> 2AgBr
(salt)

Therefore, the net ionic equation
is:2Ag(+)(aq.) + 2Br(-)(aq.) -> 2AgBr
(salt).