Besoin d'aide svp merci . C:3y+2=y-4 D:7y-3=15-2y

C)
3y + 2 = y - 4
3y - y = - 2 - 4
2y = - 6
y = - 6/2
y = - 3

D)
7y - 3 = 15 - 2y
7y + 2y = 15 + 3
9y = 18
y = 18/9
y = 2

3y+2 = y-4
3y-y=-4-2
2y=-6
y=-6/2=-3

7y-3=15-2y
7y+2y=15+3
9y=18
y=18/9=2