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Sagot :

VINS

bonjour

x

x - 7.9

x - 7.9 - 4.2 = x - 12.1

x - 12.1 + 6.4

= x -  5.7

si on choisit  7   ; 7  - 5.7 =  1.3

si on choisit  - 2 =  - 2 - 5.7 = - 7.7

x - 5.7 = - 1.4

x = - 1.4 + 5.7

x =  4.3

ona choisi  4.3

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