salut qui pourrais m'aider por ça svp 1) 7x +17 = 14x -15 2) 8x + 13 = 19x + 17 3) 13x + 18 = 10x + 17 4) 19x + 16 = 5x +5 5) 19x + 17 = 6x + 19

bonjour

7 x + 17 = 14 x - 15

7 x - 14 x = - 15 - 17

- 7 x = - 32

x = 32/7

8 x + 13 = 19 x + 17

8 x - 19 x = 17 - 13

-  11 x = 4

x = - 4/11

13 x +18 = 10 x + 17

13 x - 10 x = 17 - 18

3 x = -  1

x = - 1/3

19 x + 16 = 5 x + 5

19 x - 5 x = 5 - 16

14 x = - 11

x = - 11/14

19 x + 17 = 6 x +  19

19 x - 6 x = 19 - 17

13 x = 2

x = 2/13

Réponse :

bonjour

Explications étape par étape

1) 7x +17 = 14x -15

7x-14x=-15-17

-7x=-32

x=32/7

2) 8x + 13 = 19x + 17

8x-19x=17-13

-11x=4

x=-4/11

3) 13x + 18 = 10x + 17

13x-10x=17-18

3x=-1

x=-1/3

4) 19x + 16 = 5x +5

19x-5x=5-16

14x=-11

x=-11/14

5) 19x + 17 = 6x + 19

19x-6x=19-17

13x=2

x=2/13