This is:
[tex]144-6t\ge72[/tex]
Solve for t:
[tex]\begin{gathered} 144-6t-144\ge72-144 \\ -6t\ge-72 \\ -6t(-1)\ge-72(-1) \\ 6t\leq72 \\ \frac{6t}{6}\leq\frac{72}{6} \\ t\leq12 \end{gathered}[/tex]
Answer:
[tex]\begin{gathered} 144-6t\ge72 \\ -6t\ge-72 \\ t\leq12 \end{gathered}[/tex]
