Bonjour, j'ai besoin d'aide pour mes maths merci beaucoup et bon week-end​

Réponse :

Explications étape par étape

Bonsoir

4(x + 5) = 10x + 3

4x + 20 = 10x + 3

10x - 4x = 20 - 3

6x = 17

x = 17/6

3(x - 2) = 6(x + 4)

3x - 6 = 6x + 24

6x - 3x = -24 - 6

3x = -30

x = -30/3

x = -10

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

7x - 5x - 3 = 5x - 15 + 2

2x - 3 = 5x - 13

5x - 2x = 13 - 3

3x = 10

x = 10/3

7(n + 2) - 3 = 25 - (3n + 4)

7n + 14 - 3 = 25 - 3n - 4

7n + 3n = 21 - 11

10n = 10

n = 10/10

n = 1

4y + 3(4y - 2) = 3(y + 1)

4y + 12y - 6 = 3y + 3

16y - 3y = 3 + 6

13y = 9

y = 9/13