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In a cage, the number of chickens and rabbits is equal. There are 48 in total. How many chickens and rabbits are there? The school has 26 pairs of chess and checkers, which can be used by 120 students at the same time. Two students play chess and six students play checkers. How many pairs of chess and checkers are there?
This problem is very simple. If each chicken and rabbit has x, then it has 4x + 2x = 48. If x equals 8, then each chicken and rabbit has 8, that is 16!
There are 20 chickens and rabbits, 44 feet, how many chickens and rabbits each?
Suppose all rabbits, then chickens have: (4 × 20-44) △ 4-2, = 36 △ 2, = 18 (rabbits), then rabbits have 20-18 = 2 (rabbits). Answer: there are 18 chickens and 2 rabbits
There are 20 chickens and rabbits in a cage, and there are 44 counting feet
How to do it with the equation of first degree with one variable
Suppose there are x chickens and Y rabbits
There were 2x chicken feet and 4Y rabbit feet
Then x + y = 20
2x+4y=44
Solve the above equations
We get x = 18, y = 2
So there are 18 chickens and two rabbits
There are 100 chickens and rabbits in a cage. There are 248 feet of chickens and rabbits. How many chickens and rabbits are there?
To use equations and assumptions, two methods!
Equation: suppose that there are x chickens, then there are (100-x) rabbits. According to the meaning of the question, we get 2x + 4 (100-x) = 2482x + 400-4x = 248-2x = - 152x = 76, so 100-x = 100-76 = 24. Suppose that all the 100 chickens are chickens, then the feet are: 100 × 2 = 200. If there are 248 feet of chicken and rabbit, then the rabbits are: (248-200) /
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