20: 3.58 = (): 0.7 what should be filled in brackets

20: 3.58 = (): 0.7 what should be filled in brackets

0.7 △ 3.58 × 20 = number to be filled in

What does 0.6 × 58 mean
What does 58 × 0.6 mean? These are two questions

The product of 56 0.6 times

2.6 × 3 / 5 + 6.2 △ 4 / 5 + 6.2 × 15%
Simple calculation,

6.2 × 3 / 5 + 6.2 △ 4 / 5 + 6.2 × 15%
=6.2 × (3 / 5 + 5 / 4 + 3 / 20)
=6.2 × (12 / 20 + 25 / 20 + 3 / 20)
=6.2×2
=12.4

There are many chickens, ducks and geese in the farm. It is known that the number of chickens is half of the total number of ducks and geese, and the number of ducks is one third of the total number of chickens and geese
There are 250 geese. How many chickens are there?

Suppose the chicken is x, the duck is y, and the goose is 250
2X=Y+250
3Y=X+250
There are 200 chickens and 150 ducks
Is that so? Or is it a deeper answer?

One farmer raised three kinds of poultry, including chickens, ducks and geese. There were 31 chickens and ducks and 34 ducks and geese. The number of ducks was one fourth of the total number of chickens, ducks and geese,
Program

Suppose there are x ducks
X*4+X=31+34
5X=65
X=13
Chicken = 31-13 = 18
Geese = 34-13 = 21

The poultry farm has three kinds of poultry: chicken, duck and goose. One third of them are chickens, and one fifth of them are geese,
There are 3600 chickens and geese. How many ducks are there

[3600-3600*(1/3)-3600*(1/3)*(1/5)]/(1+1/5)=1800

There are three kinds of poultry: ducks and geese. Ducks and geese account for five twelfth of the total, geese and chickens account for three fourths of the total?

1-3 / 4 = 1 / 4 ducks account for 1 / 4 of the total
5 / 12-1 / 4 = 1 / 6 geese account for 1 / 6 of the total
3 / 4-1 / 6 = 7 / 12 chickens account for 7 / 12 of the total

Mr. Li has a total of 1000 poultry, of which chickens are two-thirds of ducks. Chickens and ducks are equal to other poultry. How many chickens are there?

If there are x ducks and 2 / 3x chickens, it's better
　2（x+2/3x)=1000
x=300
2/3×300＝200
A: 200 chickens

Uncle Li has 24 ducks. The number of geese is 3 / 1 of that of ducks. The number of ducks is 8 / 3 of that of chickens. How many chickens are there?

24 * 3 / 8 = 9

Chickens account for 52%, ducks account for 30%, geese account for 18%