Aide moi svp c'est un dm merci Resoudre les équtations

4x - 5 = -3x - 4

4x + 3x = -4 +5

7x = 1

x = 1/7

3x + 1 = 9 + 5x

3x - 5x = 9 - 1

-2x = 8

x = 8/(-2) = -4

6x - 9 = 10x + 11

6x - 10x = 11 + 9

-4x = 20

x = 20/(-4) = -5

1 - 6x = -3/2x + 7

-6x + 3/2x = 7 - 1

-12/2x + 3/2x = 6

-9/2x = 6

x = 6*2/9 = 12/9 = 4/3

3x + 5 = x + 7

3x - x = 7 - 5

2x = 2

x = 1