cc je dois resoudre des équations pour demain j'ai du mal pour certains calcules svp aider moi

1) 2x-(3x+4) = 5+(3x-7)
2x-3x-4=5+3x-7
-x-4=-2+3x
-x-3x=-2+4
-4x=2
x=-1/2
2) (-x+3) - (7-4x) = 5x+2(x+1)
-x+3-7=4x = 5x+2x+2
3x-4 = 7x +2
3x-7x = 2+4
-4x =6
x= -3/2
3) 3x-2(5-4x) = 3x +(-x+3)
-10 +8x = 3+10
9x = 13
9x=13 
x=13/9
4) 3x-(8-x) = 0
3x -8 +x=0
4x_8=0
4x=8
x=2

bonjour

2 x  - ( 3 x + 4) = 5 + ( 3 x - 7)
2 x - 3 x - 4 = 5 + 3 x - 7
- x - 3 x = 5 - 7 + 4
- 4 x = 2 
x = - 2/4 = - 1/2 


( - x + 3) - ( 7 - 4 x ) =  5 x + 2 ( x + 1) 
- x + 3 - 7 + 4 x = 5 x + 2 x + 2
3 x - 7 x = 2 - 3 + 7
- 4 x = 6 
x = - 6/4 = - 3/2 

3 x - 2 ( 5 - 4 x ) = 3 x + ( - x + 3)
3 x - 10 + 8 x = 3 x - x + 3
11 x - 3 x + x = 3 + 10
9 x = 13 
x = 13/9 

3 x - ( 8 - x ) = 0 
3 x - 8 + x = 0 
4 x = 8
x = 8/4 = 2