Svp j’ai besoin d’aide merci

Bonsoir

Résoudre les équations :

1 + 5x = -29

5x = -29 - 1

5x = -30

x = -30/5

x = -6

9 - y = -2,3

9 + 2,3 = y

y = 11,3

2x + 3 = 6x + 11

3 - 11 = 6x - 2x

-8 = 4x

x = -8/4

x = -2

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

-3 - 6x = 7x - 35

-3 + 35 = 7x + 6x

32 = 13x

x = 32/13

(2x + 3)/5 = (3x - 1)/4

4(2x + 3) = 5(3x - 1)

8x + 12 = 15x - 5

12 + 5 = 15x - 8x

17 = 7x

x = 17/7

Résoudre l’équation produit :

(3 - 4x)(x + 6) = 0

3 - 4x = 0 ou x + 6 = 0

3 = 4x ou x = -6

x = 3/4 ou x = -6

Factoriser puis résoudre :

(3x - 1)(5 - 2x) + (4x + 7)(3x - 1) = 0

(3x - 1)(5 - 2x + 4x + 7) = 0

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

(3x - 1) * 2(x + 1) = 0

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

3x - 1 = 0 ou x + 1 = 0

3x = 1 ou x = -1

x = 1/3 ou x = -1

Résoudre :

36x^2 = 81

36x^2 - 81 = 0

(6x)^2 - 9^2 = 0

(6x - 9)(6x + 9) = 0

3(2x - 3) * 3(2x + 3) = 0

9(2x - 3)(2x + 3) = 0

2x - 3 = 0 ou 2x + 3 = 0

2x = 3 ou 2x = -3

x = 3/2 ou x = -3/2

x^2 = 15

x^2 - 15 = 0

x^2 - (V15)^2 = 0

(x - V15)(x + V15) = 0

x - V15 = 0 ou x + V15 = 0

x = V15 ou x = -V15