bonjour pouvez vous maider il faut les resultats des équations: Ch: 8x= 0 Bg: 5x-3= -2x+4 Ci: 12-x= 15 Db: x/2= -2 Cb: x/2+2= x+3 Fc: 3x-5= -5 Di: 7x+2= 2(x+1)

Réponse :

Bonjour,

Explications étape par étape

Ch: 8x= 0 => x = 0

Bg: 5x-3= -2x+4

5x + 2x = 4 + 3

7x = 7

x = 7/7

x = 1

Ci: 12-x= 15

x = 12 - 15

x = -3

Db: x/2= -2

x = -2 * 2

x = -4

Cb: x/2+2= x+3

x - x/2 = 2 - 3

2x/2 - x/2 = -1

x/2 = -1

x = -1 * 2

x = -2

Fc: 3x-5= -5

3x = -5 + 5

x = 0

Di: 7x+2= 2(x+1)

7x+ 2 = 2x + 2

7x - 2x = 2 - 2

5x = 0

x = 0

Fh: 9-x= 6

x = 9 - 6

x = 3

Ef : 2x+4/3 = 2x+4

2x - 2x = 4 - 4/3

0 = 4 - 4/3

Pas de solution

Ga: 2+x= -1

x = -1 - 2

x = -3

Gc: 3(x+1)= 2x+7

3x + 3 = 2x + 7

3x - 2x = 7 - 3

x = 4

He: 4x+2= 10

4x = 10 - 2

x = 8/4

x = 2

Hh: 2(x-5)= x-6

2x - 10 = x - 6

2x - x = 10 - 6

x = 4

Ig: 7-5x= 7

5x = 7 - 7

x = 0

Ia: 4(2x+3)= 7(x+2) (il faut la valeur opposé a la solution)

8x + 12 = 7x + 14

8x - 7x = 14 - 12

x = 2

Donc opposé : x = -2

Ag: 2x-7= x-3

2x - x = 7 - 3

x = 4

Bonjour,

Ch: 8x= 0

x = 0

Bg: 5x-3= -2x+4

5x + 2x = 4 + 3

7x = 7

x = 7/7 = 1

Ci: 12-x= 15

- x = 15 - 12

- x = 3

x = - 3

Db: x/2= -2

x = - 2 * 2

x = - 4

Cb: x/2+2= x+3

x/2 - x = 3 - 2

x/2 - 2x/2 = 6/2 - 4/2

x - 2x = 6 - 4

- x = 2

x = - 2

Fc: 3x-5= -5

3x = - 5 + 5

x = 0

Di: 7x+2= 2(x+1)

7x + 2 = 2x + 2

7x - 2x = 2 - 2

x = 0

Fh: 9-x= 6

- x = 6 - 9

- x = - 3

x = 3

Ef : 2x+4/3 = 2x+4

2x - 2x = 4 - 4/3

0x --> Pas de solution

Ga: 2+x= -1

x = - 1 - 2

x = - 3

Gc: 3(x+1)= 2x+7 *

3x + 3 = 2x + 7

3x - 2x = 7 - 3

x = 4

He: 4x+2= 10

4x = 10 - 2

4x = 8

x = 8/4 = 2

Hh: 2(x-5)= x-6

2x - 10 = x - 6

2x - x = - 6 + 10

x = 4

Ig: 7-5x= 7

- 5x = 7 - 7

x = 0

Ia: 4(2x+3)= 7(x+2) (il faut la valeur opposé a la solution)

8x + 12 = 7x + 14

8x - 7x = 14 - 12

x = 2

Opposé = - 2

Ag: 2x-7= x-3

2x - x = - 3 + 7

x = 4