Question

How do you solve and write the following in interval notation: `3x< -21`?

Answer 1

`x<-7,(-oo,-7)`

Explanation:

To solve for x, divide both sides of the inequality by 3

`(cancel(3) x)/cancel(3)<(-21)/3`

`rArrx<-7" is the solution"`

`"Expressed in interval notation " (-oo,-7)`