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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

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