How do I solve -3B -[-4 2 3] = [-2 -32 -9]

Question

Hdbjd fud fi dud dood f

 

Answer 1

-3B - [-4 2 3] = [-2 -32 -9]

-3B = [-2 -32 -9] + [-4 2 3]

-3B = [-6 -30 -6]

B = [2 10 2]