Bonjour,
x/4 =9
x = 9*4 = 36
3x-11 = 9x+4
-11-4 = 9x-3x
-15 = 6x
x= -15/6 = -2,5
5x+5 = 4x-7
5x-4x = -7-5
x = -12
5x-15 = -2x -13
5x+2x+ -13 +15
7x = 2
x= 2/7 =0,2857...
x-2 = -2x +4
2x+x= 4+2
3x= 6
x= 6/3 = 2
4x+15 = 2x+3
4x-2x = 3-15
2x = -12
x= -12/2 = -6
-12<-6 < -2,5 <0,28 < 2 < 36
MDEIAN