ludmilaksenija2005

Verified answer

Объяснение:

5.

5<a<8

3<b<6

3a-6b

15<3a<24

18<6b<36

-36<-6b<-18

15<3a<24

-36<-6b<-18

-21<3a-6b<6

(-21;6)

4.

-6<a<13

-6×(-3)>-3a>13×(-3)

18>-3a>-39

-39< -3a<18