bonsoir
5 x - 3 = 2 x + 6
5 x - 2 x = 6 + 3
3 x = 9
x = 3
8 x + 26 = 6 x + 14
8 x - 6 x = 14 - 26
2 x = - 12
x = - 6
- 2 x +3 = 14 x - 1
- 2 x - 14 x = - 1 - 3
- 16 x = - 4
x = 4/16 = 1/4
( 2 x - 9 ) ( - x - 2 ) = 0
x = 9/2 ou - 2
( 3 x - 5 ) ( 18 - 2 x ) = 0
x = 5/3 ou 9
7 x ( 10 - 4 x ) = 0
x = 0 ou 10/4 = 5/2
16 x² + 8 x + 1 = 0
( 4 x + 1 ) ² = 0
x = - 1 /4
25 x² - 9 = 0
( 5 x - 3 ) ( 5 x + 3 ) = 0
x = 3 ou - 3
