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Andy and Marcus each bought the same storybook and both of them started reading their books on the same day. Marcus read 3 fewer pages than Andy each day. Marcus took 80 days to finish his storybook while Andy took 30 days fewer than him. Find the number of pages in the storybook.
Marcus => 80(x - 3) Andy => 30x
80(x - 3) = 30x
x = 4.8 (The number of pages Andy read each day.)
Number of pages in a book=> 4.8 * 30 = 144