Bonjour j’aurais besoin d’aide pour les équations svp : A : 2+16x = 3 + 15x B : 3x -14 = 9 -2x C : 5x + 6 = 12 + 15x D : 5x + 1 = 2x + 19 E : 8x + 3 = x + 15 F
Question
A : 2+16x = 3 + 15x
B : 3x -14 = 9 -2x
C : 5x + 6 = 12 + 15x
D : 5x + 1 = 2x + 19
E : 8x + 3 = x + 15
F : 2x + 3 = 6x +11
Donnez les détails si possible. Merci à ceux qui m’aideront
2 Réponse
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1. Réponse lealebeau40
Bonsoir,
A. 2 + 16x = 3 + 15x
16x - 15x = 3 - 2
x = 1
B. 3x -14 = 9 -2x
3x + 2x = 14 + 9
5x = 23
x = 23/5
C. 5x + 6 = 12 + 15x
5x - 15x = 12 - 6
-10x = 6
x = 6/-10
D. 5x + 1 = 2x + 19
5x - 2x = 19 - 1
3x = 18
x = 18/3
x = 6
E. 8x + 3 = x + 15
8x - x = 15 - 3
7x = 12
x = 12/7
F. 2x - 6x = 11 - 3
-4x = 8
x = 8/-4
x = -2 -
2. Réponse GD27
Réponse:
A : 2 + 16x = 3 + 15x
-2 -2
16x = 1 + 15x
-15x -15x
x = 1
B: 3x - 14 = 9 - 2x
+14 +14
3x = 23 - 2x
+2x +2x
5x = 23
÷5 ÷5
x = 23/5
C: 5x + 6 = 12 + 15x
-6 -6
5x = 6 + 15x
-15x -15x
-10x = 6
÷(10) ÷(10)
x = 6/-10
D: 5x +1 = 2x + 19
-1 -1
5x = 2x + 18
-2x -2x
3x = 18
÷3 ÷3
x = 3
E : 8x +3 = x + 15
-3 -3
8x = 12
÷8 ÷8
x = 1,5
F : 2x + 3 = 6x + 11
-11 - 11
2x - 8 = 6x
-2x -2x
-8 = 4x
÷4 ÷4
-2 = x
Bonne soirée