LHS = 12 - 9(0) = 12 = RHS

from pair (0 , 12) we get,

LHS = 0 - 9(12) = - 108 \neq RHS

from pair (3 , -1) we get,

LHS = 3 - 9(-1) = 12 = RHS

from pair (0 , -4/3) we get,

LHS = 0 - 9(-4/3) = 12 = RHS