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17-04-2020
Chemistry

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(+1)+(-1)=||
(2)+(-2) = 0
20+1) + (-2) = _
(+3) + 3(-1)=
37+2) + 2-3] =

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Аноним Аноним

17-04-2020

1+(-1)=0
2+(-2)=0
20+1+(-2)=19
3+3(-1)=0
37+2+2-3=38

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