They all can be split up to 6 groups because 12+18=30 so each group will have 5 kids in it.
Answer:
4083.2
Step-by-step explanation:

≥-4
Pretend the greater than or equal to sign is an equal sign, we will substitute it back in later.
x/2 = -4
Multiply both sides by 2 to get x alone
x = -8
Substitute the greater than or equal to sign back in and voila!
x≥-8