Bonsoir je n’arrive pas à résoudre mes équations : 8x+3=0 2x-9=0 49-7x=0 6x-9=0 5x-12=3 10x+1=7 9x-2=6 20-4x=4 mercii

Bonsoir

8x+3=0

8x = - 3

x = - 3/8

2x-9=0

2x=9

x = 9/2

49-7x=0

- 7x = - 49

x = 49/7

x = 7

6x-9=0

6x = 9

x = 9/6

x = 3/2

5x-12=3

5x = 3 + 12

5x = 15

x = 15/5

x = 3

10x+1=7

10x = 7 - 1

10x = 6

x = 6/10

x = 3/5

9x-2=6

9x = 6 + 2

9x = 8

x = 8/9

20-4x=4

- 4x = 4 - 20

- 4x = - 16

x = 16/4

x = 4.