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Sagot :

VINS

bonjour

A = 5 - ( 2 x + 3 ) =  5 - 2 x - 3 = - 2 x + 2

B  = x - ( 1 - 2 x ) + ( x - 5 )  = x - 1 + 2 x + x - 5 =  4 x - 6

C  = 3 - x ( 2 x + 1 ) = 3  - 2 x² - x

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