Final answer:
The opposing team has 3 more players than the first team, which is found by subtracting 12 from 15.
Step-by-step explanation:
The question you're asking is related to a simple subtraction problem in mathematics. The opposing team has 15 players while the first baseball team has 12 players. To find out how many more players the opposing team has, you subtract the smaller number (12) from the larger number (15).
15 - 12 = 3
So, the opposing team has 3 more players than the first team.