Thirty pages of a fiction book is six sets of five pages, so it will take $ 6\times 7 = 42 $ minutes to read the fiction book. Likewise, thirty pages of a history textbook is fifteen sets of two pages, so it will take $ 15\times 7 = 105 $ minutes to read the history textbook. In total, this will be $ 42+105 = \boxed{147} $ minutes.