svp pouvez vous m'aidez svp urgent devoir maison pouvez vous resoudre ses equation je n'arrivent pas 1) 8x+9=5x+11 2) 5x+17=8x-9 3) 4x-5=11x-2 4) 13x -11=7x+23

bonsoir

1) 8 x + 9 = 5 x + 11
    8 x - 5 x = 11 - 9
    3 x = 2
       x = 2/3

2) 5 x + 17 = 8 x - 9
    5 x - 8 x = - 9 - 17
    - 3 x = - 26
         x = 26/3 

3) 4 x - 5 = 11 x - 2
    4 x - 11 x = - 2 + 5
    - 7 x = 3
         x = - 3/7

4) 13 x - 11 = 7 x + 23
     13 x - 7 x = 23 + 11
     6 x = 34
         x = 34/6 = 17/3

8x +9 = 5x +11
8x -5x = 11 -9
3x = 2
x = 2/3

5x +17 = 8x -9
5x -8x = -9 -17
-3x = -26
x= 26/3

4x -5 = 11x -2
4x -11x = -2 +5
-7x = 3
x= 3/ -7

13x -11 = 7x +23
13x -7x = 23 +11
6x = 34
x= 34/6
x=17/3