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Verified Answer :

The answer for your question is 21. Which is b. The reason why i got that answer is because when  you plug in 3 then you multiply that which will give you 6 then subtract that by 27 then that will give you 21.:)

Hop this helps:)

This is how you do this:

27-(23)

PEMA = Parentheses, equation, multiplication and add. (Or subtract)

2
3 = 6

27-6 = 21

so the answer would be B. 21