Hello!
First, let's write the problem.
[tex]x-7.67\ge \:8.4[/tex]
Add 7.67 to both sides.
We are doing this in order to undo the subtraction.
[tex]x-7.67+7.67\ge \:8.4+7.67[/tex]
Simplify.
[tex]x\ge\:16.07[/tex]
Our final answer would be,
[tex]x\ge\:16.07[/tex]
You can feel free to let me know if you have any questions regarding this!
Thanks!
- TetraFish