Sagot :
Réponse :
bonjour
- 6 x + 1 = 12 x + 2
- 6 x - 12 x = 2 - 1
- 18 x = 1
x = - 1 / 18/
- 4 x - 2 x + 3 = 5 x - 5 + 2
- 6 x - 5 x = - 3 - 3
- 11 x = - 6
x = 6/11
- 8 y - 24 - 7 = 36 - 2 y - 4
- 8 y + 2 y = 36 - 4 + 24 + 7
- 6 y = 63
y = - 63/6 = - 21/2
- 7 y + 6 y - 2 = 6 y - 24
- y - 6 y = - 24 + 2
- 7 y = - 22
y = 22/7
Explications étape par étape
Réponse :
a) x = 2/3
b) x = 2
c) y = 3/2
d) y = -22/7
Explications étape par étape
a)
6 (x + 1) = 12 x + 2
6x + 6 = 12x + 2
6x - 12x = 2 - 6
-6x = -4
6x = 4
x = 4/6
x = 2/3
b)
4x - (2x - 3) = 5 (x - 1) +2
4x - 2x + 3 = 5 (x - 1) +2
2x + 3 = 5x - 5 + 2
2x - 5x = -5 + 2 - 3
-3x = - 6
3x = 6
x = 6/3
x = 2
c)
8 (y + 3) -7 = 36 - (2y + 4)
8y + 24 - 7 = 36 - 2y - 4
8y + 17 = -2y + 32
8y + 2y = 32 - 17
10y = 15
y = 15/10
y = 3/2
d)
7y + 2(3y - 1) = 6(y - 4)
7y + 6y - 2 = 6y - 24
13y - 2 = 6y - 24
13y - 6y = -24 + 2
7y = -22
y = -22/7
Voici mes raiponces, j'ai mi toutes les étapes