Bonjour
Résoudre les équations suivantes :
a) 3/5+1/2x = 8/5
1/2x = 8/5 - 3/5
1/2x = 5/5
1/2x = 1
x = 2
b) -3/2x + 1/3 = 7/3-1/2x
- 3/2x + 1/2x = 7/3 - 1/3
2/2x = 6/3
x = 2
c) 3/5 ( x - 5/7 ) = 3/10x
3/5x - 15/35 = 3/10x
3/5x - 3/10x = 15/35
3/5x - 3/10x = 3/7
6/10x - 3/10x = 3/7
3/10x = 3/7
21x = 30.
x = 30/21
x = 10/7
d) 1/3x = -2 ( 1/3x -2 )
1/3x = - 2/3x + 4
1/3x + 2/3x = 4
3/3x = 4
x = 4.
