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Sagot :

Exercice 1 :
A = 4x - 3 - 3x + 4
= x - 3 + 4
= x + 1

B = -3x+2+x-5
= -2x+2-5
= -2x-3

C = -9x+x-8+5x
= -3x-8

D = 2-2x-4x+4-x
= -7x+6


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