bonjour
tu ne précises pas de numéro
2 x- 3 = 4 + x
2 x - x = 4 + 3
x = 7
y + 4 = - 4 - 3 y
y + 3 y = - 4 - 4
4 y = - 8
y = - 2
7 x - 6 = 4 - 3 x
7 x + 3 x = 4 + 6
10 x = 10
x = 1
12 - a = 18 - 3 a
- a + 3a = 18 - 12
2 a = 6
a = 3
- t - 4 = 8 + 7 t
- t - 7 t = 8 + 4
- 8 t = 12
t = - 12/8 = - 3/ 2
continue, courage
