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There are 450 story books and science books in the corner. Among them, the number of science and technology books is two-seventh of that of story books. How many story books and science books are ther
There are 450 story books and science books in the corner. Among them, the number of science and technology books is two-seventh of that of story books. How many story books and science books are there respectively? Solution: Set up X story books and 2/7x science and technology books.

x+2/7x=450

9/7x=450

x=350

2/7x=2/7x350= 100

A: There are 350 story books and 0/00 science and technology books.

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