Answer: 6 teams
Step by step:
3 people=1 group
3+3=6
6 people taken out of 18
2 groups already
3+6=9
9 out of 18 people taken
3 groups made
9+3=12
12 out of 18 people taken
4 groups made
12+3=15
15 out of 18 people taken
5 groups made
15+3=18
18 out of 18 people taken
Answer: 6 groups made
Short step by step:
18 divided by 3 equals 6
Or
3 times 6 equals 18
I really hope that made sense