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Camilledulong
@Camilledulong
May 2019
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Bonjour, vous pouvez m'aidez à résoudre 5-(x-3)=4x-(3x-8) et
2+x-(5+2x)-7=3x+7 merci de votre aide
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Eliott78
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Bonsoir,
résoudre :
5-(x-3) = 4x-(3x-8)
5 -x +3 = 4x -3x +8
5 + 3 - 8 = x + 4x - 3x
0 = 5x - 3x
0 = 2x
x = 0
2 + x- (5+2x) -7 = 3x+7
2 + x -5 - 2x -7 = 3x + 7
2 - 7 -5 -7 = -x +2x +3x
-17 = 4x
-17/4 = x
- 4,25 = x
x = -4,25
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Thanks 1
Eliott78
Tu n'a pas compris comment faire alors ? Tu veux juste les réponses... c'est décourageant.
Eliott78
- 1/2x + 3 = x - 7
Eliott78
Je passe d'un côté les nombres et de l'autre les x
Eliott78
Mais quand on change de côté il faut penser à changer le signe
Eliott78
+3 +7 = 1/2x + x
Eliott78
10 = 3/2 x
Eliott78
10/ (3/2) = x
Eliott78
20/3 = x
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Lista de comentários
Verified answer
Bonsoir,résoudre :
5-(x-3) = 4x-(3x-8)
5 -x +3 = 4x -3x +8
5 + 3 - 8 = x + 4x - 3x
0 = 5x - 3x
0 = 2x
x = 0
2 + x- (5+2x) -7 = 3x+7
2 + x -5 - 2x -7 = 3x + 7
2 - 7 -5 -7 = -x +2x +3x
-17 = 4x
-17/4 = x
- 4,25 = x
x = -4,25