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1)a+(2b-3c);2)a-(2b-3c);3) a-(2b+3c);4)-(a-2b+3c);

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Ответ:

LyudaDolina

17.11.2020 11:14

1)a + (2b - 3c) = a + 2b - 3c 2)a - (2b - 3c) = - 2b+ 3c 3)a + (2b - 3c) = a - 2b - 4) - (a - 2b + 3c) = -a + 2b -

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