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Sagot :

Bonjour,

tout simplement : 2x + 5 = 11

AYUDA

bonjour

double de x = 2x

si on ajoute 5 => 2x + 5

et 2x + 5 = 11

2x + 5 - 5 = 11 - 5

2x = 6

2x/2x = 6/2

x = 3

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