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Sagot :

(n - 12) x 3 = n

3n - 36 = n

2n = 36

n = 18

Bonjour,

x

x-12

3(x-12) = 3x - 36

3x-36 = x

Vrai ou faux?  

3x-x= 36

2x = 36

x= 36/2

x= 18

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