Joke Collection Website - News headlines - The original ratio of science and technology books to story books in the Qingtian Primary School library was 2:5. Now the school has purchased 360 new science and technology books.
The original ratio of science and technology books to story books in the Qingtian Primary School library was 2:5. Now the school has purchased 360 new science and technology books.
Explanation: Suppose there are x science and technology books and y story books.
Get: x/y=2/5 x=2/5y
(x+360)//y=5/8
3.2y+ 2880=5y
1.8y=2880
y=1600
x=2/5*1600=640
64360 +1600=2600 (book)
Answer: There are 2600 books in one ***.
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