Answer: -1 1/5
Step-by-step explanation:
[tex]12z-3\ge \:2z-15[/tex]
[tex]12z-3+3\ge \:2z-15+3[/tex]
[tex]12z\ge \:2z-12[/tex]
[tex]12z-2z\ge \:2z-12-2z[/tex]
[tex]10z\ge \:-12[/tex]
[tex]\frac{10z}{10}\ge \frac{-12}{10}[/tex]
[tex]z\ge \:-\frac{6}{5}[/tex]
-6/5 as a mixed number is -1 1/5
