Math Please Help Make sure you explain your answer Thanks Have a blessed day!..

Answer:
15 is a solutin but 9 is not
Step-by-step explanation:
x-3=12 does not have a x a x is a 3
Answer: the answer is B
Step-by-step explanation: 15-3=12 Is true, but 9-3=12 is not true because
9-3=6 not 12 so that is why the answer is B