je ne comprend toujours rien alors pouvez vous resoudre ces equation s'il vous plait 3c+7=c+2 2+2y=-1+3y 4+5a=2a-1 t-4=-3t-10 3(h+7)=4 -3+a=7(2a-1) 2(2-y)=-6 -3

bonjour

3 c + 7 = c + 2
3 c - c = 2 - 7
2 c = - 5
c = - 5/2

2 + 2 y = - 1 + 3 y
2 y - 3 y = - 1 - 2
- y = - 3
y = 3

4 + 5 a = 2 a - 1
5 a - 2 a = - 1 - 4
3 a = - 5
a = - 5/3

t -4 = - 3 t - 10
t + 3 t = - 10 + 4
4 t = - 6
t = - 6/4 = - 3/2

3 h + 21 = 4
3 h = 4 - 21
3 h = - 17
h = - 17/3

- 3 + a = 14 a - 7
a - 14 a = - 7 + 3
- 13 a = - 4
a = 4/13


2(2-y)=-6
4  - 2 y = - 6
- 2 y = - 6 - 4
- 2 y = - 10
y = 5

-3(2t+1)=-3(t-2)
- 6 t - 3 = - 3 t + 6
- 6 t + 3 t = 6 + 3
- 3 t = 9
t = - 9/3 = - 3