1/5TH of a hive of bees flew to the kadamba flower, 1/3rd flew to the silandhara; three times the difference of these 2 numbers flew to an arbor; one bee continued to fly about, attracted on each side by the fragrant ketaki and malati. How many bees were there?

please help me on this problem as soon as possible! i'm really desperate to find out how to do this, thanks