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khadjidiatou
@khadjidiatou
July 2022
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Vrai ou faux ?
Les équations 8x + 7 = 3x + 22
et 9x – 4= 2x + 17 ont les
mêmes solutions.
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moii28
Faux puisque 8x + 7 = 3x + 22 a pour solution 29/5 tandis que l’autre a pour solution 3
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khadjidiatou
Mais ducoup c est quoi les calculs pour les deux équations
moii28
J’ai fais une erreur :
8x - 3x = 22 - 7
5x = 15
x = 15/5 = 5
moii28
9x - 4 = 2x + 17
9x - 2x = 17 + 4
7x = 21
x = 21/7 = 3
moii28
15/5=3**
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8x - 3x = 22 - 7
5x = 15
x = 15/5 = 5
9x - 2x = 17 + 4
7x = 21
x = 21/7 = 3