Bonjour,
8 - 3x - 2 = 5x - 5
- 3x + 6 = 5x - 5
- 3x - 5x = - 5 - 6
- 8x = -11
x = -11/-8 = 11/8.
7 + 6 - 2x = 4x - 1
- 2x + 13 = 4x - 1
- 2x - 4x = - 1 - 13
- 6x = - 14
x = -14/-6 = 14/6 = 7/3.
7x - 1 = 0
7x = 1
x = 1/7
et
-2x - 5 = 0
-2x = 5
x = -5/2.