HELP FAST !! What is the correct answer? I think that it’s the last one.

Answer: The third one
Step-by-step explanation: 1/21(z)=42 z=882. If you check each equation with each other the answer is correct. Also 882/21=42
Answer:
C or D
Step-by-step explanation:
its either one of those two but go woth which ever you thuink