Réponse :
Explications étape par étape :
a) 4(2 - x) + 5 = -3(2x + 3) - 12
a) 8 - 4x + 5 = - 6x - 9 - 12
a) - 4x + 6x = - 9 - 12 - 8 - 5
a) 2x = - 34
a) x = - 34 / 2 = - 17
b) 3x + 1/4 = 5x - 2/5
b) 3x - 5x = -2/5 - 1/4
b) - 2x = -8/20 - 5/20
b) - 2x = - 13/20
b) 2x = 13/20
b) x = (13/20) / 2
b) x = 13/20 *1/2
b) x = 13/40
c) x/3 + 5/6 = 1/2 - x
c) x/3 + x = 1/2 - 5/6
c) x/3 + 3x/3 = 3/6 - 5/6
c) 4x/3 = - 2/6
c) 24x = - 6
c) x = -6/24
c) x = -1/4
d) x - (x + 1) = (x + 3) - (x - 3)
d) x - x - 1 = x + 3 - x + 3
d) - 1 = 6
Faux
Bonne journée
