bonjour je besoin d'aide je comprend pas comment détaillant Résoudre les équations suivantes, en détaillant les étapes : 1) 2x + 3 = 11 2) -3x + 6 = -9 3) 2x –

Réponse :

bonjour,

1) 2x + 3 = 11

2x = 11 - 3

2x = 8

x = 8/2

x = 4

2) -3x + 6 = -9

-3x = -9 - 6

-3x = -15

x = -15/-3

x = 5

3) 2x – 5 = -16

2x = -16 + 5

2x = -11

x = -11/2

4) -x + 6 = 4x

-x - 4x + 6 = 0

-5x = -6

x = -6/-5

x = 6/5

5) 5x + 5 = 3x – 7

5x - 3x + 5 = -7

2x = -7 - 5

2x = - 12

x = -12/2

x = -6

6) 2x + 8 = 5x + 14

2x - 5x + 8 = 14

-3x = 14 - 8

-3x = 6

x = 6/-3

x = -2

7) -2x – 5 = 4x + 7

-2x - 4x -5 = 7

-6x = 7  + 5

-6x = 12

x = 12/-6

x = -2

8) x + 5 = -6x + 6

x + 6x = 6 - 5

7x = 1

x = 1/7

9) -5x – 3 = -4x – 7

-5x + 4x = -7 + 3

-x = -4

x = 4

10) 2x – 4 = 2x + 5

2x - 2x = 5+ 9

impossible

voila:)