Chickens and rabbits in the same cage problem expands!! Answers are urgently needed!! Equation solve

Arithmetic: Assuming that 20 are all A species, you need:

20 yuan. I actually used 9 yuan, the difference:

9-6=3 yuan.

Each B type should be more: yuan.

Type B bought: 3 sticks.

A type bought: 20-10 = 10 pieces.

Equation: Let A have x branches, then B has 20-x branches.

x=1020-x=20-10=10

Answer: 10 for type A and 10 for type B.

If there are x pens of type A, then the pen of type B will be 20-x.

x=1020-x=20-10=10

Set a x branch, then.

x = 10 means 10 for A and 10 for B.

If you buy X pencils of type A, you can buy 20-x pencils of type B.

9 solution: x = 10 (branches).

20—10 = 10 (branches).

A: I bought 10 pencils for each of the two pencils.

If there are x pencils of type A, then type B is (20-x).

x=10 means 10 for A, and 20-10=10 for B.

Let A pencil be x and B be y

x+y=20

The solution yields x=y=10

According to common sense, chickens have 2 legs and rabbits have 4 legs.

Solution: There are x chickens.

Since there are 70 of them, there are x chickens, then rabbits have (70-x).

The first step lists the equation 2x+4(70-x)=200, and the second step opens brackets 2x+280-4x=200

The third step is 4x-2x, 280-200 2x=80

Step 4 x = 80 2 x = 40

Knowing that there are 40 chickens, then rabbits have 70-40 = 30 (chickens).

x+y=70

2x+4y=200 There are x chickens and y rabbits.

y=70-x substitution: 2x+4(70-x)=2002x+280-4x=200

Shift: 4x-2x+280=200

2x+280=200

2x=280-200

2x=80 x=40 y=70-x=70-40=30

40 chickens and 30 rabbits Let the chickens x rabbits Y column equation 2x+4y equals 200

x+y is equal to 70

The solution of the equation x is equal to 40 and y is equal to 30

Solution: If there are x rabbits, then there are 70-x chickens, and you can get:

4x+2(70-x)=200

4x+140-2x=200

2x=60x=30

So chickens have: 70-x=70-30=40

Let us, if the big ship has x, then the small boat has 10-x, and the equation is 6x+4(10-x)=43+1

2x=4x=2 for large boats and 10-2=8 for small boats.

Assuming all the pairs, we should get: 5x1=5 (points).

The student gets 3 points, which is 2 points different from 5 points, 1 point for a correct answer, and 1 point for a wrong answer or no answer, a difference of 2 points.

False: 2 2 = 1 (Dao).

Pair: 5-1=4 (channel).

Suppose the student answers all the questions correctly, because the score: 1 5 5 points.

Less: 5 3 2 points.

Incorrect: 2 (1 1) 1 question.

True: 5 1 4 channels.

Let's say it's all chickens.

Then the number of rabbits is. ( The number of original feet - the number of chickens * 2) (4--2) The equation assumes x chickens.

The equivalence relationship is: 2x + (the number of heads originally shared - x) * 4 = the number of feet originally shared.

Let the chicken be x, the rabbit be y, the chicken has two legs, and the rabbit is four.

Then the two equations are simultaneous x+y = the number of heads, and 2x+4y = the number of legs.

Can you give me a question? Chickens and rabbits in the same cage, what do you want to answer that question?

Hypothetical method. Let's say it's all rabbits.

Number of chickens and rabbits Rabbit feet - actual number of feet = number of extra feet.

Number of extra feet (rabbit feet - chicken feet) = number of chicken sock spines.

Number of chickens and rabbits - number of chickens = number of rabbits.

Chickens and rabbits in the same cage formula.

Solution 1: (Rabbit's Feet, Total Feet, Total Feet) (Rabbit's Feet, Chicken's Feet) The number of chickens. Total number of chickens = number of rabbits.

Solution 2: ( Total number of feet Number of chicken feet Total number of birds) (Number of rabbit feet Number of chicken feet) Number of rabbits. The total number of rabbits = the number of chickens.

Solution 3: Total number of feet 2 - total number of heads = number of rabbits.

Total number of birds - number of rabbits = number of chickens.

The Learning Guide team has you covered! If you don't understand, you can ask about it.

Rabbit: (Total Legs Total Heads 2) 2

Chicken: (total number of heads 4 total number of feet) 2