Réponse :
Bonsoir,
a) x+3 = 8 f) 2x-6 = 8 b) x-4 = -8 g) 4x = 20
x = 8-3 2x = 8+6 x = -8+4 x = 20/4
x = 5 2x = 14 x = -4 x = 5
x = 14/2
x = 7
c) 5x = 15 d) x/3 = -12 e) 3x+4 = -5
x = 15/5 x = -12*3 3x = -5-4
x = 3 x = -36 3x = -9
x = -9/3
x = -3
Voilà bonne soirée !