Bonjour,
3x/4 = 5
3x= 5*4
3x = 20
x= 20/3
4x = 11+4
4x = 15
x= 15/4
7 -56 = 8x
- 49 = 8x
x = - 49/8
6x-3x = 14 +4
3x = 18
x= 18/3
x= 6
9-11 = 4x +2x
- 2 = 6x
x = -2/6
x = -1/3
