Bonjours Pouvez- vous l’aider svp 3x - 4x + 5x = 7a + 3a - 2a = 13x - 2 + 4x - 1 = 2x(2) + 4y - 6x - x(2) - y = (2x + 3) - (x - 2) = Merci!

Réponse:

Bonjour,

3x - 4x + 5x

= -x + 5x

= 4x

7a + 3a - 2a

= 10a - 2a

= 8a

13x - 2 + 4x - 1

= 13x + 4x - 2 - 1

= 17 x -3

2x(2) + 4y - 6x - x(2) - y

= 2x*2 + 4y - 6x - x*2 - y

=4x + 4y - 6x - 2x - y

= 4x - 6x - 2x + 4y - y

= - 4x + 3y

(2x + 3) - (x-2)

= 2x + 3 - x + 2

= 2x - x + 3 + 2

= x + 5