Bonjour
5x - 8 = 2
5x = 2 + 8
5x = 10
x = 10/5
x = 2
3x + 6 = 7x - 2
3x - 7x = - 2 - 6
- 4x = - 8
x = 8/4
x = 2
8x - 5 = 2x - 7
8x - 2x = - 7 + 5
6x = - 2
x = - 2/6
x = - 1/3
3 (4x + 5) + 4 = 10x - 8 + x
12x + 15 + 4 = 10x - 8 + x
12x - 10x - x = - 8 - 15 - 4
x = - 27
(3x + 7 (2x - 8) = 0
3x + 7 = 0 ou 2x - 8 = 0
3x = - 7 2x = 8
x = - 7/3 x = 8/2 = 4
x (6x + 1) = 0
x = 0 ou 6x + 1 = 0
6x = - 1
x = - 1/6
(3x + 4) (2x - 2) + (3x + 4) (7x + 1) = 0
6x² - 6x + 8x - 8 + 21x² + 3x + 28x + 4 = 0
6x² + 21x² - 6x + 8x + 28x + 3x - 8 + 4 = 0
27x² + 33x - 4 = 0
(3x + 4) (9x - 1) = 0
3x + 4 = 0 ou 9x - 1 = 0
3x = - 4 9x = 1
x = - 4/3 x = 1/9
(2x + 3) (4x - 6) - (2x + 3) (4x - 5) = 0
8x² - 12x + 12x - 18 - (8x² - 10x + 12x - 15) = 0
8x² - 12x + 12x - 18 - 8x² + 10x - 12x + 15 = 0
8x² - 8x² - 12x + 12x + 10x - 12x - 18 + 15 = 0
- 2x - 3 = 0
- 2x = 3
x = - 3/2
x² = 49
x = √49
x = 7 ou x = - 7
25x² = 36
25x² - 36 = 0
(5x - 6) (5x + 6) = 0
5x - 6 = 0 ou 5x + 6 = 0
5x = 6 5x = - 6
x = 6/5 x = - 6/5.
