9 Résoudre les équations suivantes. 2x+8 = 7 4 - 8x = 15 5x + 11 = 3x + 5 4x - 3 = -2x + 8 svp c’est important

Bonjour,

Résoudre les équations:

2x + 8 = 7

2x + 8 - 8 = 7 - 8

2x = -1

x = -1/2

4 - 8x = 15

-8x + 4 = 15

-8x + 4 - 4 = 15 - 4

-8x = 11

8x = -11

x = -11/8

5x + 11 = 3x + 5

5x + 11 - 11 = 3x + 5 - 11

5x = 3x - 6

5x - 3x = 3x - 6 - 3x

2x = -6

x = -6/2 = -3

4x - 3 = -2x + 8

4x - 3 + 3 = -2x + 8 + 3

4x = -2x + 11

4x + 2x = -2x + 11 + 2x

6x = 11

x = 11/6

Bonne journée.