Daniel and Arya each want to run for president of Student Council. In order to do so, they
must collect a certain number of signatures and get a nomination. So far, Daniel has 15
signatures, and Arya has 11. Daniel is collecting signatures at an average rate of 3 per day,
whereas Arya is averaging 5 signatures every day. Assuming that their rate of collection stays
the same, when will they have the same number of signatures?
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