Salut !
Réponse :
2) 2x + 3x + 4x - x - 2x + x
= 2x - 2x + x - x + 3x + 4x (on regroupe)
= 0 + 0 + 7x (on calcule)
= 7x (et c'est fini !)
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Salut !
Réponse :
2) 2x + 3x + 4x - x - 2x + x
= 2x - 2x + x - x + 3x + 4x (on regroupe)
= 0 + 0 + 7x (on calcule)
= 7x (et c'est fini !)