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Sagot :

VINS

bonjour

3 x = 15

x = 15/3 = 5

2 x = 5

x =  5/2

x + 7 = 18

x = 18 - 7

x =  11

dernière manque  x quelque part

Bjr,

x = 15/3 = 5

x = 5/2

x = 18 - 7

x = 11

x = -12/2 = -6

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