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Which of the following expressions is correct? -(-21) = 21 -(21) = 21 -(-21) = -21 (-21) = 21
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Which of the following expressions is correct?

-(-21) = 21
-(21) = 21
-(-21) = -21
(-21) = 21

User Mogsdad
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2 Answers

4 votes
a is the correct answer 
User Timnavigate
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4 votes
(-21)=21 is the correct answer

User Grep
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8.9k points
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