Aidez moi ,Résoudre chaque équation : a)-3(3x+1) - (2+x)=0 b)4(x-5) +7(3-2x)= -5(3x+1)

a/
-9x-3-2-x =0
-10x -5 =0
-10x = 5
x = 5/ -10
x = -1/2

b)

4x-20+21-14x= -15x-5
-10x +1 = -15x-5
-10x+15x = -5-1
5x = -6
x= -6/5

a)
- 3(3x + 1) - (2 + x) = 0
- 9x - 3 - 2 - x = 0
- 5 = 9x + x
- 5 = 10x
- 5/10 = x
- 1/2 = x

4(x - 5) + 7(3 - 2x) = - 5(3x + 1)
4x - 20 + 21 - 14x = - 15x - 5
4x - 14x + 15x = - 5 - 21 + 20
5x = - 6
x = - 6/5