4.8-4.5x=3.9

4.8-4.5x=3.9

4.5x=4.8-3.9
x=0.2

3.5x [6.6 - (1.6x) 0.9] △ 8.4 = 0.5

x=4.4

There are 100 chickens and rabbits in the same cage. The number of legs of a chicken is 28 less than that of a rabbit. How many chickens and rabbits are there?
Please answer in detail·······

4 * 100 = 400, 400-0 = 400 suppose all rabbits have 400 feet, then the chicken's foot is 0, and the chicken's foot is 400 less than the rabbit's. 400-28 = 372, the actual chicken's foot is 28 less than the rabbit's foot, the difference is 372, why? 4 + 2 = 6, this is because as long as a rabbit is replaced by a chicken

There are chickens and rabbits in a farm. If the sum of the number of chickens and rabbits is 180 and the sum of the number of legs is 480, then there are more chickens than rabbits

Solution 1: suppose there are x chickens, then there are (180-x) rabbits
2x+4(180-x)=480
The solution is x = 120
180-120 = 60 rabbits
Rabbits 120-60 more than chickens = 60
Solution 2: suppose there are x chickens and Y rabbits
x+y=180
2x+4y=480
The solution is x = 120, y = 60
120-60 = 60

There are chickens and rabbits in a pasture. The sum of the number of chickens and rabbits is 180, and the sum of the number of legs is 480. How many chickens and rabbits are there?
To set up a system of equations,

Suppose there are x chickens and Y rabbits
x+y=180
2x+4y=480
The solution is x = 120
y=60
A: there are 120 chickens and 60 rabbits

There are 30 chickens and rabbits on the farm, with a total of 88 feet. How many chickens and rabbits are there?

There are 16 chickens and 14 rabbits

There are 100 chickens and rabbits on the farm. Their legs add up to 240 legs. How many rabbits and chickens are there?!

80 chickens, 20 rabbits

There are 8 chickens and 22 rabbits with 22 legs. How many chickens and rabbits are there?

Suppose all rabbits have legs
8 × 4 = 32
Much more than it actually is:
32-22 = 10
Rabbits have more legs than chickens
4-2 = 2
Chicken has:
10 △ 2 = 5
The rabbit has:
8-5 = 3

1. There are a group of chickens and rabbits. The total number of feet is two times more than the total number of heads. How many rabbits are there?
2. Aunt Li bought 5 pears and an apple, a total of 3.3kg. If two pears are equal to three apples, how about a pear and an apple each weighing several thousand grams?
We need the formula! I haven't learned X and y~

There are a group of chickens and rabbits. The total number of feet is two times more than the total number of heads. How many rabbits are there?

Because the chicken has two feet and the rabbit has four
So 22 times more than rabbits
So there are 22 / 2 rabbits = 11