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25-02-2017
Mathematics

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From 12x - 6y + 9z subtract -x -3z + 6y . A) 12z - 13x - 12y B) 13x + 12y + 12z C) - 13x - 12y - 12z D) 13x - 12y + 12z

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Quirkyowl Quirkyowl

25-02-2017

12x - 6y + 9z - (-x - 3z + 6y) = 12x - 6y + 9z + x + 3z - 6y = 13x - 12y + 12z

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