Aidez moi ! Équations ! ^^ A) -2 (3-2x) = x-8 B) 8(1+7x) = -3(5-2x) C) 3-3(2x-7) = 2x-5(x-3) D) 2x-3(2-2x) = 8(-x+1)+2 Merci d'avance :)
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Question
Aidez moi ! Équations ! ^^
A) -2 (3-2x) = x-8
B) 8(1+7x) = -3(5-2x)
C) 3-3(2x-7) = 2x-5(x-3)
D) 2x-3(2-2x) = 8(-x+1)+2
Merci d'avance :)
A) -2 (3-2x) = x-8
B) 8(1+7x) = -3(5-2x)
C) 3-3(2x-7) = 2x-5(x-3)
D) 2x-3(2-2x) = 8(-x+1)+2
Merci d'avance :)
1 Réponse
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1. Réponse maudmarine
A) -2 (3-2x) = x-8
- 6 + 4x = x - 8
4x - x = - 8 + 6
3x = - 2
x = - 2/3
B) 8(1+7x) = -3(5-2x)
8 + 56x = - 15 + 6x
56x - 6x = - 15 - 8
50x = - 23
x = - 23/50
x = - 0,46
C) 3-3(2x-7) = 2x-5(x-3)
3 - 6x + 21 = 2x - 5x + 15
- 6x - 2x + 5x = 15 - 3 - 21
- 3x = - 9
x = 9/3
x = 3
D) 2x-3(2-2x) = 8(-x+1)+2
2x - 6 + 6x = - 8x + 8 + 2
2x + 6x + 8x = 8 + 2 + 6
16x = 16
x = 16/16
x = 1