bonjour
5 x + 15 = 3 + 2 x - 6
5 x - 2 x = 3 - 6 - 15
3 x = - 15
x = - 5
- 4 x + 8 = 6 x + 3 - x
- 4 x - 6 x + x = 3 - 8
- 9 x = - 5
x = 5/9
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bonjour
5 x + 15 = 3 + 2 x - 6
5 x - 2 x = 3 - 6 - 15
3 x = - 15
x = - 5
- 4 x + 8 = 6 x + 3 - x
- 4 x - 6 x + x = 3 - 8
- 9 x = - 5
x = 5/9