If 30 people are sent from team a to team B, the ratio between team a and team B will be 3:2. How many people are there in each team?

3 + 2 = 5, 7 + 3 = 10, 30 ^ (25-310), = 30 ^ 110, = 300 (people); the number of team a: 300 × 710 = 210 (people); the number of team B: 300-210 = 90 (people); answer: the original number of team a is 210, the original number of team B is 90

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