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adriannacomrosenbark
17.03.2022 •
Mathematics
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Ответ:
3x + 14y
Step-by-step explanation:
(5x + 9y - z ) + (-2x + 7y + z)
5x + 9y - z - 2x + 7y + z
3x + 9y - z + 7y + z
3x + 14y
Ответ: