Bonjour merci de m'aider

Bonjour

x - 5 = 3

x = 3 + 5

x = 8

4x = 9

x = 9/4

- 3x + 8 = 10

- 3x = 10 - 8

- 3x = 2

x = - 2/3

2x - 1 = 7x - 11

2x - 7x = - 11 + 1

- 5x = - 10

x = 10/5

x = 2.

x-5=3

x=3+5

x=7

4x=9

x=4/9

-3x+8=10

-3x=10-8

-3x=2

x=2/-3

2x-1=7x-11

2x-7x=-11+1

-5x=-10

x= -10/-5

x= 10/5

x=2

en espérant avoir pu t'aider ;)