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The sixth grade of mathematics, page 20, newspaper, ability test, question 7, How to write a smart house is the original story book and fairy tale book in the school library. The ratio is 3: 2.
Solution: If there are X original storybooks and fairy tales, the original storybooks are 3 /5X and the original fairy tales are 2 /5X.

(3/5X-350):(2/5X-360)=2: 1

2(2/5X 360)= 3/5X 350

4/5x-720=3/5X-350

1/5X=370

X= 1850

Original storybook:1850 * 3/5 =101850 * 2/5 = 740.

Hint: The method of solving equation is the basic property of proportion.

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