Final answer:
The expression equivalent to -6(2x - 1/3) is -12x + 2, which is only represented by option b) in the choices provided.
Step-by-step explanation:
The expressions equivalent to -6(2x - 1/3) are obtained by distributing the -6 inside the parentheses.
-6 × 2x = -12x
-6 × (-1/3) = 2
Therefore, the equivalent expression is -12x + 2, which matches option b).
Option c) -12x + 18 is not equivalent because -6 × (-1/3) is not 18.
Option d) 12x - 2 is not equivalent because the negative sign is not distributed correctly.