There are 600 literature books in the library, which is exactly 40% of the total number of science and technology books. How many science and technology books are there?
Let the number of science and technology books be x.
X* 1 1/20-84=400
X* 1 1/20=400+84
X* 1 1/20=484
X=880
A: The number of science and technology books is 880.
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