The solution of the proportion, what is the solution of the proportion

A proportional solution is a solution that contains unknowns in the proportion, like solving an equation. Proportion is a mathematical term that denotes two or more formulas that are equal to the loss of the equation. In a ratio, the product of the two outer terms is equal to the product of the two inner terms, which is called the basic property of the proportion.

In mathematics, if a change in the amount of a variable is always accompanied by a change in another variable, then the two variables are proportional, and if the change is always associated by using a constant multiplier, then the constant is called the scale coefficient or the proportionality constant.

2∶9＝x∶129x＝24

It works on the principle that the product of the inner term is equal to the product of the outer term.

1）85：x=20：4

20x=85 4,20x 20=340 20,x=17 2)20x=340,x=340 20,x=17 Therefore, the answer is: the basic property of the local mountain proportional trace spring, the basic property of the equation

x Hunger 2): 12 = 4: Three-quarters.

then x-2 = 4 4/3 12 = 64

Solution x=66

7/40 = x plus 30/20

Then x = 7/40 - 20 parts of a bad resume 30 = 7/40 of 40 - 40 molecules 60 = -53 of 40

So x = -53/40

Solve with proportions. On a map with a scale of 1:30000000, AB is 9 cm long, if it is drawn on a map of 1:250000000, how many cm should it be?

To lay floor tiles for a house, choose 3dm 3dm, you need 960 pieces, if you choose 4dm 4dm, how many pieces are needed.

must be resolved with a proportional ratio.

The ratio of the number of people in the two road construction teams is 7 to 3From team A to team B, the ratio of the number of people is 3 to 2. The state is sure to be correct in solving the problem of the old and the bad.

To solve with proportions means to solve with unknowns in the proportions, like solving equations.

1. Solution: Let it be xcm

x/(1:25000000)=9/(1:30000000)x=9*30000000/25000000x=

A: Yes. 2. Solution: X blocks are required.

x*4*4=960*3*3

x=960*9/16

x=5403, solution: Let the original team A have 7x people, and team B has 3x people.

7x-30):(3x+30)=3:2

7x-30)*2=(3x+30)*3

14x-60=9x+90

5x=150

x = 30 Team A has 30 * 7 210 (people).

Team B has 30*3 90 (people).

It can be solved like this without proportions:

Total number of people: 30 (7 10-3 5) 300 people.

Team A: 300*7 10 210 (people).

Team B: 300-210 90 (people).

x:b=c:d

x×d=b×c

x=b×c÷d

For example, the first question:

x:84=5/7:10

10x=84×5/7

10x=60

x=60÷10

x=6, and so on.

This problem is to solve the equation, and if you solve the equation, you can do it.

Move the term to get x

As long as the answer or the process?