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12×+4×-3y+4×+5z+3y-2z​

Răspuns :

Răspuns:

12x + 4x - 3y + 4x + 5z + 3y - 2z = 12x + 4x + 4x + 5z - 2z = 20x + 5z - 2z = 20x + 3z