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Sagot :

Réponse :

bonsoir

Explications étape par étape :

a)

6x + 12 = 5

6x = 5 - 12

6x = - 7

x = -7/6

__________

3x = x - 13

3x - x = -13

2x = - 13

x = -13/2

x = - 6,5

______________

4x + 12 = - 3x - 11

4x + 3x = -11 -12

7x = - 23

x = -23/7

bonne soirée

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