Question

-9/10<x/4<-2/5

Answer 1

x=-1,-2,-3

Answer 2

MSC:20

-18/20<X x 5/20<-8/20

vậy x=-1,-2,-3

Answer 3

\(\Rightarrow\dfrac{-18}{20}< \dfrac{x.5}{20}< \dfrac{-8}{20}\\ \Rightarrow x\in\left\{-17;-16;-15;-14;-13;-12;-11;-10;-9\right\}\)

\(\Rightarrow x.5⋮\left\{-15;-10\right\}\\ \Rightarrow x=\left\{-3;-2\right\}\)

Answer 4

MSC:20

-18/20<X x 5/20<-8/20

vậy x=-1,-2,-3