Question

Ai giúp tớ vs ạ!! Gấp lắm!!

Answer 1

`-1/5 <= x/8 <= 1/4`

`<=>[-8]/40 <= [5x]/40 <= 10/40`

`<=>-8 <= 5x <= 10`

`<=>-8/5 <= x <= 2`

Answer 2

\(\Rightarrow-\dfrac{8}{40}< \dfrac{x}{40}< \dfrac{10}{40}\) 

\(\Rightarrow x\) là các số : \(-7,-6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6,7,8,9\)