Bonjour, je vais te faire ce que je peux avant de repartir en cours.
Exercice 3 :
a)
7x + 8 = 10
7x = 10 - 8
7x = 2
x = 2/7
b)
5x - 3 = 0
5x = 3
x = 3/5
c)
8x + 10 = 5
8x = 5 - 10
8x = -5
x = -5/8
d)
- 3x + 4 = 2
- 3x = 2 -4
- 3x = -2
x = -2/3
Exercice 4 :
a)
4x = 7x - 2
2 = 7x - 4x
2 = 3x
x = 2/3
x = 1
b)
12x = 5x - 2
12x - 5x = - 2
7x = -2
x = -2/7
c)
8x = -2x + 10
8x + 2x = 10
10x = 10
x = 10/10
x = 1
d)
- 3x = 5x + 2
- 3x - 5x = 2
- 8x = 2
x = 2/-8
J’espère t'avoir aidé sur ces deux exercices je reprends les cours. Bonne journée !
