Resous chaque equation si desous A)-2(2x-4)=6x-(-3+x) B)4x-2+(5x-1=-3(7-x C)((x+5)÷2)-((2x-7)÷5=2+3x÷10 Cordialement

Bonjour,

A)-2(2x-4)=6x-(-3+x)

- 4x + 8 = 6x + 3 - x

- 4x - 6x + x = 3 - 8

- 9x = - 5

x = 5/9

B)4x-2+(5x-1=-3(7-x )

4x - 2 + 5x - 1 = - 21 + 3x

4x + 5x - 3x = - 21 + 2 + 1

6x = - 18

x = - 18/6

x = - 3

C)((x+5)/2)-((2x-7)/5=2+3x/10

((5x + 25) / 10) - ((4x - 14) / 10) = 20/10 + 3x/10

5x + 25 - 4x + 14 = 20 + 3x

5x - 4x - 3x = 20 - 25 - 14

- 2x = - 19

x = 19/2

x = 9,5

Réponse :

slt !

a) -2 (2x-4)= 6x -(-3+x)

-4x + 8 = 6x + 3 + x

-4x + 8 - 8 = 7x + 3 -8

-4x = 7x -5

-4x -7x = 7x -5 -7x

-11x = -5

-11x : -11 = -5 : -11

x = [tex]\frac{-5}{-11}[/tex]