Réponse :
Bonjour
Explications étape par étape :
Résolutions d'équation
-3x = 12
x = 12/-3 = -4
4x + 9 = 5
4x = -9 + 5
4x = -4
x = -4/4 = -1
6x + 15 = 9x
6x -9x = -15
-3x = -15
x = -15/-3 = 5
3 - 2x = 4x -9
-2x -4x = -3 -9
-6x = -12
x = -12/-6 = + 2
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Réponse :
Bonjour
Explications étape par étape :
Résolutions d'équation
-3x = 12
x = 12/-3 = -4
4x + 9 = 5
4x = -9 + 5
4x = -4
x = -4/4 = -1
6x + 15 = 9x
6x -9x = -15
-3x = -15
x = -15/-3 = 5
3 - 2x = 4x -9
-2x -4x = -3 -9
-6x = -12
x = -12/-6 = + 2