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Leadesm
@Leadesm
May 2019
1
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Bonjour, je suis en 4eme et je n'arrive pas à faire cet exercice:
Résoudre chaque équation
a) 3(2x - 7)= -2(5x + 4)-10
b) 5(3-6x) + 20x= 7(2-4x)
Merci Cordialement
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nonotata
Verified answer
Bonjour
a) 3(2x - 7)= -2(5x + 4)-10
6x-21 = -10x-8-10
6x+10x = -18+21
16x = 3
x =3/16
b) 5(3-6x) + 20x= 7(2-4x)
15-30x +20x = 14-28x
15 -10x = 14 -28x
-10x +28x = 14-15
18x = -1
x = -1/18
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Leadesm
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Lista de comentários
Verified answer
Bonjoura) 3(2x - 7)= -2(5x + 4)-10
6x-21 = -10x-8-10
6x+10x = -18+21
16x = 3
x =3/16
b) 5(3-6x) + 20x= 7(2-4x)
15-30x +20x = 14-28x
15 -10x = 14 -28x
-10x +28x = 14-15
18x = -1
x = -1/18