Question

-14 < 7x < 21
Solve the compound iniquity and graph it’s solution.

Answer 1

-2 < x < 3

Explanation:

-14 < 7x < 21

Divide all three sides by 7 :

`-14 < 7x < 21`

`\Longleftrightarrow (-14)/(7) < (7x)/(7) < (21)/(7)`

`\Longleftrightarrow -2 < x < 3`

The solution in interval notation (-2 , 3)