Bonjour,
Exercice 134
6x<23-5
6x< 18
x< 18/6
x< 3
-6x < 23 -5
-6x < 18
x<-18/6
x<-3
3x-2x< 5
x<5
8x-x ≥1
7x≥1
x ≥ 1/7
Exercice 135
3x-x <10-2
2x < 8
x< 8/2
x<4
4-2 ≤5x-3x
2 ≤ 2x
x ≥ 2/2
x ≥ 1
2-10 < 5x-3x
-8 < 2x
x > -8/2
x> -4
7x ≥ 12-4
7x ≥ 8
x ≥8/7