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Sagot :

Bonjour

Réduire les expressions suivantes :

A = 13 + (x - 6) = 13 + x - 6 = x + 7

B = - 5 - (4 - 2x) = - 5 - 4 + 2x = 2x - 9

C = 10 - (x + 3) + (- 3x + 6)

C = 10 - x - 3 - 3x + 6

C = - 4x + 13

D = (5 + 2x) - (- 7- 7x)

D = 5 + 2x + 7 + 7x

D = 9x + 12

E = x - 8 - (2 + 4x - (9 - 5x))

E = x - 8 - (2 + 4x - 9 + 5x)

E = x - 8 - 2 - 4x + 9 - 5x

E = - 8x - 1.

Bonjour :)

Bon courage !

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