![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
The ratio of chickens, ducks and geese raised by the farm is 4:3:2. This farm has 240 more chickens than geese. How many chickens, ducks and geese are raised in this farm
4-2=2
240/2=120
Chicken: 120 * 4 = 480
Duck: 120 * 3 = 360
Goose: 120 * 2 = 240
There are 10600 chickens, ducks and geese in the pasture. Duck: Chicken = 3:5, duck: Goose = 4:7. How many chickens, ducks and geese are there
Suppose duck X. then chicken is 5x / 3 and goose is 7x / 4
x+5x/3+7x/4=10600
X = 2400, chicken is 2400 * 5 / 3 = 4000
2400 * 7 / 4 = 4200 for Geese
There are 450 chickens and ducks in the farm. Later, half of the chickens were sold and 30 ducks were bought. Now, the chickens are twice as many as the ducks. Q: how many chickens and ducks are there?
Let's do the equation
There were x chickens and (450-x) ducks
x÷2=【（450-x）+30】×2
x=384
450-x=450-384
=66
A: there are 384 chickens and 66 ducks
He raised 1720 chickens and ducks, and generally sold them. After buying 260 ducks, the index of chickens and ducks was equal. How many chickens and ducks were there
Everybody, answer quickly,
Let x chickens and Y ducks have X + y = 1720. (1)
After selling half of the chicken and buying 260 ducks, the number of chickens and ducks is equal, i.e. 1 / 2x = y + 260. (2)
Simultaneous equation (1) (2), x = 1320, y = 400
A total of 1720 chickens and ducks were raised. Half of the chickens were sold and 260 ducks were bought. At this time, the number of chickens and ducks was equal. How many chickens and ducks were there? No equation
There are 1320 chickens and 400 ducks. Note: after 260 ducks are bought, if the chicken is not sold, then the chicken is twice as much as the duck. Chicken and duck can be regarded as a total of 3 shares, with 2 chicken shares and 1 duck share. How much each share is: (1720 + 260)? 660 (ducks) then the chicken is 660? 1320 (ducks) and the original duck is 660-260 = 400 (ducks)
There were 450 chickens and ducks in the feeding group. Later, half of the chickens were sold and 30 ducks were bought. At this time, the number of chickens and ducks was twice that of ducks. How many were there?
To explain and count
There were 384 chickens and 66 ducks
The ratio of chickens to ducks in the farm is 5:2. After 120 chickens are sold, the ratio of chickens to ducks is 9:4. How many ducks are there in the farm?
Give a correct formula and thinking
If the number of ducks does not change, the number of ducks is taken as unit 1
Ducks: 120 ÷ (5 / 2-9 / 4) = 480
There are 1500 chickens and ducks in a feed farm. One quarter of the chickens are 15 less than 40% of the ducks. How many chickens and ducks are there?
Suppose there are x ducks
There are (1500-x) chickens
The equation is as follows
（1500-X）* 1/4 = 40%*X-15
375-X/4=0.4X-15
X=600
1500-600=900
So there are 600 ducks and 900 chickens
Help the first floor to revise a question, 40% * X
There are 3000 chickens and ducks in a feed farm. One fourth of ducks are less than 40% of chickens. How many chickens and ducks are there?
Set X ducks
X/4+30=(3000-X)*40%
X/4+30=1200-0.4X
0.65X=1170
X=1800
Chicken = 3000-1800 = 1200
Ducks = 1800
The number of chickens in mathematical feed factory is 120 less than that of ducks, and the number of ducks raised by mathematical feed factory is 20% more than that of chickens?
I calculated: 120 △ 20% = 600, then 600 is + or - and 600 is chicken or duck. That's what I want to ask
Chicken: 120 △ 20% = 600
There are fewer chickens than ducks, and more ducks than chickens
If you have any questions, please ask,
RELATED INFORMATIONS
- 1. In 6 / 15, 2 / 15, 4 / 25, 2 / 3 Of these four fractions, the one that can be reduced to a finite number is
- 2. A number reasoning problem: 2, 3, 6, 9, 18, ()
- 3. A number reasoning problem of civil servants: 14,24,12,0, () options have 2,3, - 3, - 5 and explain the law
- 4. Number reasoning 3,8,24,48120, ()
- 5. Number reasoning 1,1,8,16,7,21,4,16,2. () what's the next number?
- 6. Find out the following rules: 1,5,4,8,7,11,10, () what number to fill in the blank? Find out the following rules: 1,5,4,8,7,11,10, () What's the number in the blank, please?
- 7. What number should be after 1 4 11 27 61
- 8. A number reasoning problem: 28 18 32 14 36 10 ()
- 9. Given the equation system ax + by = 15, ① ax by = - 1 / 2, ② because a misread a in ①, the equation system {x = - 3, y = - 1} is obtained; B misread B in ②, the solution of the equation system is {x = 5, y = 4}. If calculated according to the correct a and B, the solution of the original equation system is {x = 5, y = 4}?
- 10. It is known that the system of equations x + 2Y = 10, ax + by = 1 has the same solution as the system of equations BX + AX = 6, 2x-y = 5 It is known that the system of equations x + 2Y = 10, ax + by = 1 about X, y has the same solution as the system of equations BX + ay = 6, 2x-y = 5. Find the value of a, B
- 11. This is the condition: class 61 and class 62 have the same kind of movie tickets. Class 61 48 people pay 16.5% and class 62 15.4%
- 12. 3.6/15+2.5*1.4
- 13. 20: 3.58 = (): 0.7 what should be filled in brackets
- 14. () / () = 0.6 fill in the figures in brackets /It means divide by
- 15. How many numbers can I fill in the brackets?
- 16. Tennis 7:6 (6), What's more, 6:6 for seven is even again?
- 17. () Purple () red () () normalization fill in the brackets to form words
- 18. Fill in the brackets below with the words of numbers () needle () thread () hammer () refine () Purple () red () perfect () beauty () needle see blood () think and act Lift () reverse () horizontal () vertical () towards () evening () () pick () flowers bloom () () return to one
- 19. 8.18.2811.313812.)
- 20. A few math problems! Very urgent! Today! 1, a can be divided by B, then the greatest common factor of a and B is () 2, a is a multiple of B, then the greatest common factor of a and B is () 3, a and B are prime, then the greatest common factor of a and B is () If 4, a and B are two consecutive positive integers, then the greatest common factor of a and B is () 5, number a = 3xax7, number b = 2x3xb, the greatest common factor of number a and number B is 21, then a is the minimum, B = The two prime numbers whose difference is 1 are () and (), and their greatest common factor is (). The two natural sums are 216. If their greatest common factor is 24, then these two numbers are () What are the two double digits of the product of two books equal to the product of 21x24 within 7 and 50? 8. A rectangular splint 2 meters long and 8 decimeters wide should be sawed into several squares with the same area as large as possible, and there is no surplus. How many pieces can this splint be sawed into? 9. On the Double Ninth Festival, the teachers and students of Xiangming middle school went to the nursing home to visit the elderly. They prepared 320 apples, 240 oranges and 200 pears to express their sympathy to the elderly. How many of the same gifts can they share with them? How many apples, oranges and pears are there in each gift?