Respuesta :

groganwhittakeri

Answer:

I think the answer is A

Step-by-step explanation:

First you would need to subtract 21 and 6, and then divide the difference of that by 3
it’s A, you need to make sure that you’re dividing what’s in the parenthesis and make sure that 3 gets divided into it as well and the 21:-6 is above a division line with three underneath