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Sagot :

Explications étape par étape:

D = 3 + 24 + 8x = 27 + 8x

E= 21 - 7b + 4 - 5b= -12b + 25

F=2 + 3a +6b -12 = 3a + 6b - 10

Bonjour,

D = 3 + 8 (4 + x)

D = 3 + 32 + 8x

D = 8x + 35

E = (3 - b) * 7 + 4 - 5b

E = 21 - 7b + 4 - 5b

E = - 7b - 5b + 21 + 4

E = - 12b + 25

F = 2 + 3 (a + 2b - 4)

F = 2 + 3a + 6b - 12

F = 3a + 6b - 10.

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