Bonjour, j'ai ces équations à effectuer, pouvez vous m'aider s'il vous plait? 1. x/2 - 2 = - x/2 + 2 2. 3(x - 2) = 3 3. 7(x +1) = 0 4. 2(x + 3) = 3(x - 3) 5. 7x

1. x/2 - 2 = - x/2 + 2

1- x/2 - 4/2= -x/2 + 4/2

x -4 = -x + 4

x+x = 4 +4

2x = 8

x = 8/2

x= 4                                                                                                 

 2. 3(x - 2) = 3

3x -6 = 3

3x = 3 +6

3x= 9

x= 9/3

x = 3

 3. 7(x +1) = 0

7x +7 = 0

7x = -7 

x = 7/-7

x= -1

 4. 2(x + 3) = 3(x - 3)

2x + 6 = 3x - 9

2x -3x = -9 -6

-x = -15

x = 15

 5. 7x + 12 = 2x - 8

7x - 2x = -8 -12

5x = -20

x = -20/5

x= -4

 6. -2 + 4x = 5x + 13

4x -5x = 13 +2

-x = 15

x= -15

 7. -3x - 5 - 2x = 19 - 3x + 10

-3x-2x+3x=19+10+5

-5x + 3x = 34

-2x = 34

x= 34/-2

x= -17

 8. 25x + 15 = 150 + 20x

25x -20x = 150-15

5x= 135

x= 135/5

x= 27

 9. 11x - 4 = 32 - 8x

11x+8x = 32 +4

19x = 36

x= 36/19

x=1.894....infini