Sagot :

Vins

Bj

4 - 12.5 x < - 3.7

- 12.5 x < - 3.7 - 4

- 12.5 x < - 7.7

x >  7.7 /12.5  = > 0.616

] 0.616 :  + ∞ [

9 +  2 x /3 ≤  20/7

147 /21 + 14 x /21 ≤  60/21

14 x ≤ 60 - 147

14 x ≤  - 87

x ≤ - 87/14

] - ∞ ; - 87/14 ]