A teacher asks the class to finish reading a storybook within a number of days. If Vanessa reads $$30$$ pages a day, she will finish reading $$2$$ days later than the given deadline. If she reads $$39$$ pages a day, she will finish reading $$4$$ days ahead of the deadline.  In how many days are the students supposed to finish reading the storybook?  How many pages has the storybook? 
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