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王老师与王平和李刚两位同学的平均年龄是20岁。李老师与王平和李刚两位同学的平均年龄是18岁。王老师今年32岁,李老师今年多少岁?
Wang and Li Ping, Wang Ping and two classmates the average age is 20 years old. Teacher Li and Wang Ping and Li Gang, the average age of two students is 18 years old. Mr. Wang is 32 years old this year, how old is Mr. Li?