bonjour
3 est - il solution ?
8 ( 15 - 2 ) = 8 ( 3 - 4 )
8 * 13 = 8 * - 1
104 ≠ - 8
2 x² = 6 x- 1
2 * 3² = 6 *3 - 1
18 = 18 - 1
18 ≠ 17
8 x - 9 = 12 x + 35
8 x - 12 x = 35 + 9
- 4 x = 44
x = - 11
21 - 3 x = 3 x - 4
- 3 x - 3 x = - 4 - 21
- 6 x = - 25
x = 26/5
3 x + 7/4 = 2 x - 8 /11
3 x - 2 x = - 8/11 - 7 /4
132 x /44 - 88 x /44 = - 32 /44 - 77 /44
44 x = - 109
x = - 109/44