Question

Which of the following changes would
cause the reaction below to shift in the
forward direction to reestablish
equilibrium?
2 NBra (g) = N2 (g) + 3 Br (g)

Answer 1

First I assume the a is a typo:
2 NBra (g) = N2 (g) + 3 Br (g) and it should read as
2 NBr(g) = N2 (g) + 3 Br (g) but it still is not balanced and the 3Br probably should read Br2.
Secondly, you don't show any changes. If you want it to shift forward you will need to increase concentration of NBr, or decrease N2 or Br2