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Ilyes834
@Ilyes834
July 2022
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Bonjour svp aidez moi c’est un dm de 4eme sur les équations j’y arrive pas merci beaucoup de votre aide (15pts)
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jaeee
Bonjour,
1. 7x7+4 = 53
7x3-8 = 13
2.a. X x 7 + 4= 7X + 4
X x 3 - 8 = 3X - 8
b. 7X + 4 = 3X - 8
c. 7X + 4 + 8 = 3X - 8 + 8
7X- 7X + 12 = 3X-7X
12 = - 4X
12/-4 = -4X/-4
-4 = X
Le x minuscule signifie le signe de la multiplication
Et le X majuscule pour la lettre
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1. 7x7+4 = 53
7x3-8 = 13
2.a. X x 7 + 4= 7X + 4
X x 3 - 8 = 3X - 8
b. 7X + 4 = 3X - 8
c. 7X + 4 + 8 = 3X - 8 + 8
7X- 7X + 12 = 3X-7X
12 = - 4X
12/-4 = -4X/-4
-4 = X
Le x minuscule signifie le signe de la multiplication
Et le X majuscule pour la lettre