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ProblemedeMaths4
@ProblemedeMaths4
January 2021
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Bonjour, pour demain j'ai un dm mais j'ai besoin d'aide pour seulement l'exercice 2 qui est : Les équations ci-dessous ont-elles la même solution que l'équation 6X - 9 = 12 - 3X ? Justifie.
Pour l'équation de l'énoncé je pense faire :
6X - 9 = 12 - 3X
6X - 9 +9 = 12 - 3X + 9
6X + 3X = 12 - 3X + 3X +9
6X + 3X = 12 + 9
9X / 9 = 21 / 9
X = 21 / 9 ??
Donc si c'est sa? Je doit l'appliquer sur les autres :
a. 2X - 3 = 4 - X oui/non
b. 2X - 3 = 6 - X oui/non
c. 6X + 3X = 12 + 9 oui/non
d. 9X - 9 = 12 oui/non
Merci, de m'aider..
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