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ZekiaChin
@ZekiaChin
April 2019
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Bonjour ,
Résoudre une équation :
a) 3x + 2 = 2x - 5 ; b) - 3x + 7 = 3x - 11.
a) 2(x - 5) = 3x + 5 ; b) -4(3 + x) = 2x - 6.
J'espère recevoir de l'aide , merci. Exercice de 4ème sur les équations.
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maudmarine
Verified answer
Résoudre une équation
:
a)
3x + 2 = 2x - 5
3x - 2x = - 5 - 2
x = - 7
b)
- 3x + 7 = 3x - 11.
-3x - 3x = - 11 - 7
- 6x = - 18
x = 18/6
x = 3
a)
2(x - 5) = 3x + 5
2x - 10 = 3x + 5
2x - 3x = 5 + 10
-x = 15
x = -15
b)
-4(3 + x) = 2x - 6
- 12 - 4x = 2x - 6
-4x - 2x = - 6 + 12
- 6x = 6
x = - 6/6
x = - 1
0 votes
Thanks 1
ZekiaChin
Merci. :)
winner123
Verified answer
Bonsoir
a) 3x + 2 = 2x - 5
3x -2x = -5 -2
x = -7
b) - 3x + 7 = 3x - 11.
-3x -3x = -11 -7
-6x = - 18
x = 18/6
x = 3
a) 2(x - 5) = 3x + 5
2x -10 = 3x +5
2x -3x = 5 +10
-x = 15
x = -15
b) -4(3 + x) = 2x - 6.
-12 -4x = 2x -6
-4x -2x = -6 +12
-6x = 6
x = -1
1 votes
Thanks 2
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Bonjour , devoir sur les pourcentages en maths 1ere. Aidez moi je vous en pris ! Merci d'avance.
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Verified answer
Résoudre une équation :a)
3x + 2 = 2x - 5
3x - 2x = - 5 - 2
x = - 7
b)
- 3x + 7 = 3x - 11.
-3x - 3x = - 11 - 7
- 6x = - 18
x = 18/6
x = 3
a)
2(x - 5) = 3x + 5
2x - 10 = 3x + 5
2x - 3x = 5 + 10
-x = 15
x = -15
b)
-4(3 + x) = 2x - 6
- 12 - 4x = 2x - 6
-4x - 2x = - 6 + 12
- 6x = 6
x = - 6/6
x = - 1
Verified answer
Bonsoira) 3x + 2 = 2x - 5
3x -2x = -5 -2
x = -7
b) - 3x + 7 = 3x - 11.
-3x -3x = -11 -7
-6x = - 18
x = 18/6
x = 3
a) 2(x - 5) = 3x + 5
2x -10 = 3x +5
2x -3x = 5 +10
-x = 15
x = -15
b) -4(3 + x) = 2x - 6.
-12 -4x = 2x -6
-4x -2x = -6 +12
-6x = 6
x = -1