catwomn catwomn

14-12-2017
Mathematics

contestada

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

Respuesta :

Аноним Аноним

14-12-2017

(-21)=21 is the correct answer

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Аноним Аноним

18-12-2017

a is the correct answer

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