To find the situation that describes opposite quantities that when combined equal 0, we need to look for pairs that cancel each other out.
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A deposit of $10 to a bank, a fee charged of $20, and a deposit of $30.
- Overall = 10 (deposit) - 20 (fee) + 30 (deposit) = 20. (Not equal to 0)
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A deposit of $20 to a bank and a fee charged of $20.
- Overall = 20 (deposit) - 20 (fee) = 0. (Equal to 0)
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A withdrawal of $20 to a bank and a fee charged of $20.
- Overall = -20 (withdrawal) - 20 (fee) = -40. (Not equal to 0)
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A fee of $10 charged by a bank, a deposit of $10, and a withdrawal of $30.
- Overall = -10 (fee) + 10 (deposit) - 30 (withdrawal) = -30. (Not equal to 0)
The correct answer is "A deposit of $20 to a bank and a fee charged of $20."