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Sagot :

KWEEN
B= -2(x-5)-3(7-4x)
B= -2x+10-21+12x
B= 10x-11

C= 8+2y-5(2y-6)+4
C= 8+2y-10y+30+4
C= 42-8y

D= -7y-4(3y-6)+3+2(3y-7)
D= -7y-12y+24+3+6y-14
D= -13y+13

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