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Sagot :

Hello,

A = (+4) - (-2) + (-8) - (+7)

A = 4 + 2 - 8 - 7

A = 6 - 8 - 7 = - 2 - 7 = -9

bonjour:

A = (+4) - (-2) + (-8) -(+7)

A = 4+2 -8-7

A = 6-8-7

A = -2-7

A =-9  

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