Equation à résoudre s'il vous plait merci d'avance. 2x+8=5 4x-3=-2x+8 3x-5=7x+2 5(3-x)-2(3x-1)=3(x-5) 4(x-3)-9x²=2x-(3x+1)(3x-1) (6x+1)²=4x(9x-5) 3(7-2x)-5(2x+1

Réponse :

bonsoir

2 x + 8 = 5

2 x = 5 - 8

2 x = - 3

x = - 3/2

4 x - 3 = - 2 x + 8

4 x + 2 x = 8 + 3

6 x =  11

x = 11/6

3 x - 5 = 7 x + 2

3 x - 7 x = 2 + 5

-  4 x = 7

x = - 7/4

15 - 5 x - 6 x + 2 = 3 x - 15

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

- 14 x = - 2

x = 1/7

4 x - 12 - 9 x² = 2 x -  ( 9 x² - 1 )

- 9 x² + 4 x - 12 = 2 x - 9 x² + 1

- 9 x² + 9 x² + 4 x - 2 x = 1 + 12

2 x = 13

x = 13/2

36 x² + 12 x+ 1 = 36 x² - 20 x

36 x ² - 36 x² + 12 x + 20 x = - 1

32 x = - 1

x = - 1/32

21 - 6 x - 10 x - 5  = 0

- 16 x = 5 - 21

- 16 x = - 16

x = 1

Explications étape par étape

Réponse :

Bonsoir

Explications étape par étape

Résoudre :

2x+8=5

2x = 5 - 8

x = -3/2

4x-3=-2x+8

4x + 2x = 8 + 3

6x = 11

x = 11/6

3x-5=7x+2

7x - 3x = -5 - 2

4x = -7

x = -7/4

5(3-x)-2(3x-1)=3(x-5)

15 - 5x - 6x + 2 = 3x - 15

17 - 11x = 3x - 15

17 + 15 = 11x + 3x

14x = 32

x = 32/14

x = 16/7

4(x-3)-9x²=2x-(3x+1)(3x-1)

4x - 12 - 9x² = 2x - (9x² - 1)

4x - 2x - 12 = 9x² - 9x² + 1

2x = 1 + 12

x = 13/2

(6x+1)²=4x(9x-5)

36x² + 12x + 1 = 36x² - 20x

36x² - 36x² + 12x + 20x = -1

32x = -1

x = -1/32

3(7-2x)-5(2x+1)=0

21 - 6x - 10x - 5 = 0

16 - 16x = 0

16x = 16

x = 16/16

x = 1