Bonjour Le nombre - 2 est t'il solution des equations suivantes ? :
2x - 4 = -7
3x -9 = 4x - 5
-5x + 3 = 5 - 4x
Merci !
2x - 4 = -7
3x -9 = 4x - 5
-5x + 3 = 5 - 4x
Merci !
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bonjour
2 x - 4 = - 7
- 4 - 4 = - 7
- 8 ≠ - 7
3 x - 9 = 4 x - 5
- 6 - 9 = - 8 - 5
- 15 ≠ - 13
- 5 x + 3 = 5 - 4 x
10 + 3 = 5 + 8
13 = 13
donc il est solution