Answer :
Answer is 46. Re-check with your teacher to make sure she made no mistakes in your question.
We’ll start in the multiplication because we are using operation by order so
20 - 16 + 42 = 4 + 42 = 46
The answer is 46 so I think there is something wrong with what you typed on in your question
20 - 16 + 42 = 4 + 42 = 46
The answer is 46 so I think there is something wrong with what you typed on in your question