Réponse :
bonsoir
4 h + 19 = -2 h - 17
4 h + 2 h = - 17 - 19
6 h = - 36
h = - 6
4 g + 1 = 7 g + 2
4 g - 7 g = 2 - 1
- 3 g = 1
g = - 1 /3
5 + 3 t /4 = 17
20 /4 + 3 t / 4 = 68/4
3 t = 68 - 20
3 t = 48
t = 16
- t + 3 = t + 15
- t - t = 15 - 3
- 2 t = 12
t = - 6
Explications étape par étap