Qui peux m’aider à faire l’exercice N 100

bonjour

4 ( 2 x  - 1 ) = 7

8 x - 4 = 7

8 x =  7 + 4

8 x = 11

x = 11/8

- 2 x + 3 = - 2 ( x - 5 )

- 2 x + 3 = - 2 x + 10

- 2 x + 2 x = 10 - 3

0 x =  7

pas de solution

- 5 ( 4 + 3 x )  = 2 ( - x + 1 )

-  20 - 15 x   = - 2 x + 2

-  15 x + 2 x = 2 + 20

-  13 x = 22

x = - 22/13

- 4 x - 10 = - 5 x - 1

- 4 x + 5 x = - 1 + 10

x =  9

3 x /10 + 1.4 = x + 2

3 x /10 + 14 /10 = 10 x /10 + 20/10

3 x - 10 x = 20 -  14

- 7 x =  6

x = - 6/7

6 - 3 x = 5 - x

- 3 x + x = 5 - 6

-  2 x = - 1

x = 1/2