Bonsoir
Résoudre les équations suivantes :
a. 2+2x=4
2 x = 4 - 2
2 x = 2
x = 1
b. -7x+4=3
- 7 x = 3 - 4
- 7 x = - 1
x = 1 /7
c.3/x = -8
- 8 x = 3
x = - 3 /8
d. 5-3x= -15
- 3 x = - 15 - 5
- 3 x = - 20
x = 20/3
e. x-9= 12x
x - 12 x = 9
- 11 x = 9
x = - 9 /11
f. x/9= 3
x = 27
