# How do you solve the compound inequalities #60 < 20u < 120#?

##### 2 Answers

Jul 15, 2018

#### Explanation:

#"divide all intervals by 20"#

#3< u < 6" is the solution"#

#u in(3,6)larrcolor(blue)"in interval notation"#

Jul 15, 2018

Interval notation:

#### Explanation:

Remember, the end goal is to isolate **all** intervals by

This means the solutions of this inequality are values of

We can alternatively write this in interval notation as

Notice that we used parenthesis as opposed to brackets when we don't include the end values.

Hope this helps!