Ответ:
(9x−13y+30z)−(−25x+30y−25z) = 9x−13y + 30z +25x - 30y+25z = 34 x- 43y + 55z
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Ответ:
(9x−13y+30z)−(−25x+30y−25z) = 9x−13y + 30z +25x - 30y+25z = 34 x- 43y + 55z