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Sagot :

Bonjour,

Exercice 13

x+2x= 2 016

3x = 2 016

x= 2 016/3 = > 672

Exercice 14

x+ 3x = 2 016

4x = 2 016

x= 2 016/4 =>504

Exercice 15

(20 - 0,80 )/6=> 3,20€

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