There are 20 heads and 54 legs in the same cage. How many chickens and rabbits are there? What about the fairies? We'll meet tomorrow. Let me know!

Suppose there are x chickens, then there are (20-x) rabbits
2X+4（20-X）=54,X=13,
20-13 = 7, that is, 13 chickens and 7 rabbits
There are several ways to do it
Owner's reference:
This is the lesson plan of the primary school

Chicken and rabbit in the same cage, a total of 100 heads, 272 legs?

X+Y=100
2X+4Y=272
X=64
Y=36

Chickens and rabbits are in the same cage, with 40 heads on the top and 100 feet on the bottom. How many chickens and rabbits are there?

Suppose it's all rabbits, chicken: (4 × 40-100) / (4-2) = 60 / 2 = 30; rabbit: 40-30 = 10; answer: there are 30 chickens and 10 rabbits

RELATED INFORMATIONS

1. Chickens and rabbits in the same cage, a total of 100 heads, 272 legs, how many chickens and rabbits each? The reason should be explained clearly
2. There are 20 heads and 54 legs in the same cage. How many chickens and rabbits are there?
3. There are 17 heads and 42 legs in the same cage. How many chickens and rabbits are there?
4. Chickens and rabbits are in the same cage, with 8 heads and 20 legs. How many chickens and rabbits are there? How to do it with arithmetic
5. How many chickens and rabbits with 21 heads and 56 legs in the same cage?
6. Chickens and rabbits in the same cage, 8 heads, 20 legs, how many chickens and rabbits each? Using equation
7. How many chickens? How many rabbits? Solve the equation
8. Chickens and rabbits in the same cage, a total of 20 heads, 62 legs, ask how many chickens and rabbits each?
9. Chickens and rabbits in the same cage, 17 heads, 42 legs, chickens, rabbits each have a few There are 13 chickens and 4 rabbits. Is there any more?
10. There are 35 chickens and 94 legs in the same cage. How many chickens and rabbits are there
11. In mathematics, the problem of chicken and rabbit in the same cage should be solved by equations Several chickens and rabbits are kept in the same cage. There are 6 heads and 18 legs of known chickens and rabbits. How many chickens and rabbits are there?
12. Mathematical solution to the equation A tea is 128 yuan per kilogram, B tea is 98 yuan per kilogram. The two kinds of tea are 12 kg in total. It costs 46 yuan less to buy a tea than B tea. How many kg of each kind of tea do you buy?
13. Column equation solution application problem, is about chicken and rabbit with cage First, there are 40 chickens and rabbits, and 100 feet. How many chickens and rabbits are there
14. Uncle Wang bought a total of 14kg of 120 yuan 1kg black tea and 160 yuan 1kg green tea, sharing 2080 yuan: how many kg did he buy each of the two kinds of tea?
15. If the speed of trains on Shanghai Nanjing line is increased from 120 km / h to 160 km / h and the time from Shanghai to Nanjing is reduced by 40 minutes, how many km are there on Shanghai Nanjing line?
16. A road repair team built 215 full-length roads on the first day and 12 full-length roads on the second day. At this time, there are still 1800 meters to reach the midpoint of the road. How long is the road?
17. A mathematical problem to list equations In the third day of junior high school, each group sent a photo to others, and the whole group sent a total of 90 photos. Suppose there are x people in this group. According to the meaning of the question, we can get the equation We need reasons, but we don't need answers
18. On the examples and examples of the area problems of quadratic equation of one variable It is an application problem of area of quadratic equation of one variable!
19. A solution to an applied problem of quadratic equation of one variable There are 100 fruit trees with an average of 1000 fruits per tree. If there are more than one tree, each tree will produce two less fruits. How many trees should be planted in order to increase the yield by 15.2%
20. Wang Ma went to the vegetable market to buy pork, and the vendor weighed her 4 jin. Wang Ma suspected that the vendor's scale was not accurate. She added her own 100 g weight into the scale and asked to weigh it again. The result was 4.25 Jin. How many liang of pork should the vendor supply Wang Ma?