Ответ:
(5x−21y+23z)−(−22x+23y−22z)=5x-21y+23z+22x-23y+22z=27x-44y+45z
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Ответ:
(5x−21y+23z)−(−22x+23y−22z)=5x-21y+23z+22x-23y+22z=27x-44y+45z