Résoudre chaque équation a) 2a + 7 = 1 b) -4 = 6 + 5x c) 5 - x = 8 d) 5x - 8 = 3x e) 4x = 3 - 2x f) x = 4x - 6
Mathématiques
Dédédu13
Question
Résoudre chaque équation
a) 2a + 7 = 1
b) -4 = 6 + 5x
c) 5 - x = 8
d) 5x - 8 = 3x
e) 4x = 3 - 2x
f) x = 4x - 6
a) 2a + 7 = 1
b) -4 = 6 + 5x
c) 5 - x = 8
d) 5x - 8 = 3x
e) 4x = 3 - 2x
f) x = 4x - 6
2 Réponse
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1. Réponse Omnes
Salut,
a) 2a + 7 = 1
2a = 1 - 7
2a = -6
a = -6/2
a = -3
b) -4 = 6 + 5x
-4 - 6 = 5x
-10 = 5x
-10/5 = x
-2 = x
c) 5 - x = 8
-x = 8-5
-x = 3
x = -3
d) 5x - 8 = 3x
5x - 3x = 8
2x = 8
x = 8/2
x = 4
e) 4x = 3 - 2x
4x + 2x = 3
6x = 3
x = 3/6
x = 1/2
f) x = 4x - 6
x - 4x = -6
-3x = -6
x = -6/-3 = 2
Bonne soirée ! -
2. Réponse nonoduchablais
Salut :)
a) 2a + 7 = 1
2a = 1 - 7
2a = -6
a = -6/2
a = -3
b) -4 = 6 + 5x
-4 - 6 = 5x
-10 = 5x
x = -10/5
x = -2
c) 5 - x = 8
-x = 8 - 5
-x = 3
x = -3
d) 5x - 8 = 3x
-8 = 3x - 5x
-8 = -2x
x = -8/-2
x = 4
e) 4x = 3 - 2x
4x + 2x = 3
6x = 3
x = 3/6
x = 1/2
x = 0.5
f) x = 4x - 6
x - 4x = -6
-3x = -6
x = -6/-3
x = 2
J'espère t'avoir aidé(e)! :)