## College Algebra 7th Edition

$[3, 6]$ Refer to the image below for the graph.
Add $4$ to each part of the inequality to obtain: $\begin{array}{ccccc} &5+4 &\le &3x-4+4 &\le &14+4 \\&9 &\le &3x &\le &18 \end{array}$ Divide $3$ to each part of the inequality to obtain: $\begin{array}{ccccc} &\dfrac{9}{3} &\le &\dfrac{3x}{3} &\le &\dfrac{18}{3} \\&3 &\le &x &\le &6 \end{array}$ Thus, the solution set is $\bf[3, 6]$. To graph this solution set, plot solid dots at $3$ and $6$ then shade the region in between. (refer to the attached image in the answer part above for the graph)