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
