Bonjour je dois resoudre ses equation 1) 6x-2=x-3 2) 7x-4=2x+5 3)3x+7=-3x 4)5x-3=-13x +6 5) 3-2x=x+15 6)4x+7=15x-3 mercii d'avance

Réponse :

Explications étape par étape

Bonjour,

1) 6x-2=x-3

6x-x = -3 +2

5x = -1

x= -1/5

2) 7x-4=2x+5

7x-2x = 5 +4

5x = 9

x= 9/5

3)3x+7=-3x

3x+3x = -7

6x = -7

x= -7/6

4)5x-3=-13x +6

5x+ 13x = 6 +3

18x = 9

x= 9/18 = 1/2

5) 3-2x=x+15

3-15 = x+2x

-12 = 3x

-12/3 = -4

6)4x+7=15x-3

7+3 = 15x -4x

10 = 11x

x= 10/11

Bonjour !

1)

6x - 2 = x - 3

6x - 2 + 2 = x - 3 + 2

6x = x - 1

6x - x = x - x - 1

5x = -1

x = -1/5

2)

7x - 4 = 2x + 5

7x - 4 + 4 = 2x + 5 + 4

7x = 2x + 9

7x - 2x = 2x - 2x + 9

5x = 9

x = 9/5

3)

3x + 7 = -3x

3x + 7 - 7 = -3x - 7

3x = -3x - 7

3x + 3x = -3x + 3x - 7

6x = -7

x = -7/6

4)

5x - 3 = -13x + 6

5x - 3 + 3 = -13x + 6 + 3

5x = -13x + 9

5x + 13x = -13x + 13x + 9

18x = 9

x = 1/2

5)

3 - 2x = x + 15

3 - 3 - 2x = x + 15 - 3

-2x = x + 12

-2x - x = x - x + 12

-3x = 12

x = -4

6)

4x + 7 = 15x - 3

4x + 7 - 7 = 15x - 3 - 7

4x = 15x - 10

4x - 15x = 15x - 15x - 10

-11x = -10

x = 10/11

J'espère t'avoir aidé. Bon courage !