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Sagot :

Bonjour,

[tex]W = ( - 9) + ( - 15) - ( + 1) + ( + 4) - ( - 8)[/tex]

[tex] = - 9 - 15 - 1 + 4 + 8[/tex]

[tex] = - 10 - 15 + 12[/tex]

[tex] = - 10 - 3[/tex]

[tex] = - 13[/tex]

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