Bonjour pouvez vous m aider svp 1)5x+8=3x-10 2) x-4=7x+8 3)2x-9=7x+6 4) -2x+1=16-5x

Bonjour,

1)5x+8=3x-10

5x - 3x = - 10 - 8

2x = - 18

x = - 18/2

x = - 9

2) x-4=7x+8

x - 7x = 8 + 4

- 6x = 12

x = - 12/6

x = - 2

3)2x-9=7x+6

2x - 7x = 6 + 9

- 5x = 15

x = - 15/5

x = - 3

4) -2x+1=16-5x

- 2x + 5x = 16 - 1

3x = 15

x = 15/3

x = 5.

bonsoir,

5 x + 8 = 3 x - 10

5 x - 3 x= - 10 - 8

2 x  = - 18

x =  - 9

 2 x - 9 =  7 x + 6

2 x- 7 x = 6 + 9

- 5 x = 15

x = - 3

- 2 x + 1 = 16 - 5 x

-  2 x + 5 x = 16 - 1

3 x  = 15

x = 5