Bonjour
Résoudre les équations :
a) 2(3x - 5) = 5(x - 2) + 3
6x - 10 = 5x - 10 + 3
6x - 5x = - 10 + 3 + 10
x = 3
b) -4(-2x + 1) + x - 7 = 5x - (-x + 3)
8x - 4 + x - 7 = 5x + x - 3
8x + x - 5x - x = - 3 + 4 + 7
3x = 8
x = 8/3
c) 4x - 3(-2x + 7) = x + 5 - (3 - 5x)
4x + 6x - 21 = x + 5 - 3 + 5x
4x + 6x - x - 5x = 5 - 3 + 21
4x = 23
x = 23/4.
