Question

Solve inequalities using the addition and subtraction properties of inequality. And Solve three part inequalities.12x < -21answer from book. graph number line and and (a) x (b) (-inf, -7/4)

Answer 1

Given the inequality;

`12x<-21`

Then, we will divide both sides of the inequality by 12;

`\begin{gathered} (12x)/(12)<-(21)/(12) \\ x<-(7)/(4) \end{gathered}`

The number line graph is;

The interval notation solution is;

`(-\infty,-(7)/(4))`