Answer:
Remember PEMDAS!!!! The answer is the first box (20x3+4/8) I strongly suggest you read below because PEMDAS is a basic skill used throughout life.
Explanation:
Parentheses
Exponents
Multiplication (left to right)
Division (left to right)
Addition (left to right)
Subtraction (left to right)
search it up and look for a mathisfun article for more info.