There are 69 children's literature books in the corner of the fourth grade class, twice as many as science and technology books. How many books are there?
Solution: Suppose there are X science and technology books. rule
2x+5=69
2x=69-5
x=32
Total number of two books =69+32= 10 1 (this book)
A: These two books have 10 1 volume.