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Sagot :

Réponse :Bonjour:

9x - 8 = - 3x + 31

9x + 3x = 31 + 8

12x = 39

x = 39/12

VINS

bonjour,

9 x - 8 = - 3 x + 31

9 x + 3 x = 31 + 8

12 x = 39

x =  3.25

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