bonjour pourriez vous m'aidez pour cette exercice svp ! x+12=7 9+x=15 3,2+x=6 x-10=5 x-6,5=8 x-(-3)=8 2x=11 -4x=13 2,6x=31,2 ×÷9=5 x÷12=-7 x÷-6=8 2x+8=7 4-8x=15

Bonjour,

x+12=7

x = 7 - 12

x = - 5

9+x=15

x = 15 - 9

x = 6

3,2+x=6

x = 6 - 3,2

x = 2,8

x-10=5

x = 5 + 10

x = 15

x-6,5=8

x = 8 + 6,5

x = 14,5

x-(-3)=8

x + 3 = 8

x = 8 - 3

x = 5

2x=11

x = 11/2

x = 5,5

-4x=13

x = - 13/4

x = - 3,25

2,6x=31,2

x = 31,2/2,6

x = 12

×÷9=5

x/9 = 45/9

x = 45

x÷12=-7

x/12 = - 84/12

x = - 84

x÷-6=8

- x/6 = 48/6

x = - 48

2x+8=7

2x = 7 - 8

2x = - 1

x = - 1/2

x = - 0,5

4-8x=15

- 8x = 15 - 4

- 8x = 11

x = - 11/8

x = - 1,375

5x+11=3x+5

5x - 3x = 5 - 11

2x = - 6

x = - 6/2

x = - 3

4x-3=-2x+8

4x + 2x = 8 + 3

6x = 11

x = 11/6