Subtracting 5 from both sides will be your best choice.
For instance, your problem states x + 5 ≥ 10
Now to isolate x you will need to get rid of the 5. Since a addition sign is before 5 we will need to use the subtraction property to isolate x. It will look like so,
x + 5 ≥ 10
-5 -5
You will be left with x ≥ 5.
Hope this helped! :)