Bonjour j'ai un exercice à faire et je n'y arrive pas .Merci d'avance Il faut résoudre les équations -2x-3=1 5x-8=7 2+3x=14 2x+7=4 3-7x=3 4x+1=5 Voila j'espèr

Bonsoir,

-2x-3=1

- 2x = 1 + 3

- 2x = 4

x = - 4/2

x = - 2

5x-8=7

5x = 7 + 8

5x = 15

x = 15/5

x = 3

2+3x=14

3x = 14 - 2

3x = 12

x = 12/3

x = 4

2x+7=4

2x = 4 - 7

2x = - 3

x = - 3/2

3-7x=3

- 7x = 3 - 3

- 7x = 0 --> Impossible

4x+1=5

4x = 5 - 1

4x = 4

x = 4/4

x = 1.

bonsoir

- 2 x - 3 = 1

- 2 x = 1 + 3

- 2 x = 4

x = - 2

5 x - 8 = 7

5 x = 7 + 8

5 x = 15

x = 3

2 + 3 x = 14

3 x = 14 - 2

3 x = 12

x = 4

2 x + 7 = 4

2 x = 4 - 7

2 x = - 3

x = - 3/2

3 - 7 x = 3

- 7 x = 3 - 3

x = 0

4 x + 1 = 5

4 x = 5 - 1

4 x = 4

x = 1