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Anonymous users2024-02-057 (more exercise books than pencils).
Yuan) (subtract the price of the exercise book more than the pencil, and the pencil and the exercise book cost the same) 10 (the number of pencils).
10 + 7 = 17 (book) (the number of books).
Set up the book that the teacher explained to buy x copies, and buy y pencils.
Simplification to 5x+4y=125
4x+5y=118
20x+16y=500
20x+25y=590
The solution yields y=10, x=17
So the teacher asked him to buy 17 books and 10 pens.
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Anonymous users2024-02-04Solution: x=17 y=10
Inspection: If you buy one more practice and one pencil less, you will find more in total, and the number of 2 books will be different.
17-10=7 shows that the result is correct (in fact, you can set x and x+7 directly without testing).
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Anonymous users2024-02-03Long answer: Let the number of exercise books and pencils be x, y, respectively, then:
The final answer is x=17 y=10
That is, the teacher originally planned to buy exercise books for Xiaohu, and the number of exercise books was 17.
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Anonymous users2024-02-02It should be 13 copies.
With about or one equal to 13, the result is as follows.
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Anonymous users2024-02-01If the two of them each buy 2 more copies, then Xiao Ming's number of copies is 4 times that of Xiao Hua.
Xiao Hua: 4 2-2) (6-4) = 3 copies and Xiao Ming has 6 times the number of *** books as Xiao Hua.
Xiao Ming: 3 6=18 copies
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Anonymous users2024-01-31Original male employees: 128x1 4=32 people.
Female employees: 128x(1-1 4) = 96 people.
Male students added: (128x2 5-32) (1-2 5) = 32 people now have employees: 128 + 32 = 160 people.
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Anonymous users2024-01-30The number of female employees has not changed, so 128 * 3 4 = 96 Now there is a total of 96 (3 5) = 160 people.
Seek adoption
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Anonymous users2024-01-2980% of dictionaries make a profit of 15 yuan, and 20% of dictionaries make a profit of 15-3=12 yuan, so:
Profit per 10 units: 15 8 + (15-3) 2 = 144 (yuan) a total profit of 864 yuan, the number of units is: 864 144 = 6 (units) 10 units sold dictionary: 10 6 = 60 (units).
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Anonymous users2024-01-28Set: This batch of fruits x kg
According to the title, got.
30%x+(1-30%) 50%x=195 to get x=300
A: This batch of fruits has a total of 300kg
Have a great holiday! Remember the split year sedan car is well received, and the sail is open
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Anonymous users2024-01-27To build a canal, the length of the first week is 25% of the untrimmed and buried, and the second week is 840 meters, the length of these two weeks is equal to 3/8 of the total length, how many meters were repaired in the first week?
840 [Zhi Roll 3 8-25% (1+25%)] 25% (1+25%)840 [Friend 3 8-1 5] 1 5
360 meters.
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Anonymous users2024-01-265 8-1 4=3 8
In the first week, 560 meters of Celery oak were repaired.
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