Math master, please tell me the problem of solving a one dimensional equation, the following questio

1.The list price is $x.

According to the title:

x=2352.Let the first number be x

According to the title: 100-x-3 x+3

x 47 The second number is: 47+3+3=53

3.Set to ride x kilometers per hour.

According to the title: (9-8) x (10-8)*

x=154.Let the first number add 2, the second number minus 2, multiply the third number by 2, and divide the fourth number by 2, and the result is x

According to the question: (x-2)+(x+2)+(x*2)+(x 2) 99x 22, then these four numbers are 24, 20, 11, 44 5Solution: Bring x 5 into the equation

Get: a*5-8=20+a

a*5=28+a

a=76.Solution: Set the purchase price to be $x

According to the title: 110 x = 400*

110%x=330

x=300

1、x*80%=188 x=235

I'm going to be busy when I don't have time, I'll give it to you tomorrow.

I'll give it a try.

1.The list price is $x.

2.Let the first number be x

Then 100-x-3 x+3 is x 47, so the second number is 533Set x kilometers per hour (9-8) x (10-8)*4Let the final result be x

then (x-2) + (x+2) + (x*2) + (x 2) 995Just bring x 5 into the equation.

6.I forgot about this.

50 minutes 5-6 hours.

The solution is that B rides x kilometers per hour, which is derived from the title.

5 (dec. 5 6) 5 x 6, 5 x 6 5 (3 2 5 6), x 6 14 6, x 14.

B rides 14 kilometers per hour.

To solve a one-dimensional equation problem, you should first find the equiquantity relationship, then list the equations according to the equiquantity relationship, and then find the solution of the equation.

Solution: Let B travel x kilometers per hour.

5km hours = 50xx =

Solution: If x tool holders are sold, then 50x blades (1-5)x+50x (

4x+25x=8400

x=400 (put).

50x=20000 (put).

i.e. 400 knife holders and 20,000 blades are sold.

Represents the multiplication sign. Hope it works for you.

Solution: Set up manufacturer B to sell x knife holders, 50x blades.

The solution is x=400

It sells 400 knife holders and 20,000 blades.

The cost of the knife holder should be one yuan.

Solution: If the number of knife holders sold by manufacturer B is x, then: the number of blades sold by manufacturer B is 50x.

The profit of manufacturer A from the sale of old-fashioned razors is: 8400 * (yuan) The profit of manufacturer B from the sale of knife holders is: x( (yuan)

The profit of manufacturer B selling blades is: 50x( (yuan) So: there is an equation according to the title.

Solve this equation to get: x=5600 17 329

That is: during this time, manufacturer B sold 329 knife holders and 16,450 blades.

Set the sales knife holder to x then.

x=400 blade=20000

(x=400

Manufacturer B sold 400 knife holders and 20,000 blades.

Solution: Set the annual interest rate to x.

3000+3×3000x=3243

x = A: The annual interest rate is.

If factory A actually produces x tons and plant B produces 4000-x tons, then A plans to produce x 112%, and B plans to produce (4000-x) 110%, so x 112% + (4000-x) 110% = 4000-400x = 2240

Therefore, the original production task of factory A was 2240 112% = 2000 tons.

Let the velocity of A be x km/h, then the velocity of B is x+1 kmh, and the equation is according to the meaning of the problem

2x+（x+x+1）×10=120

That is, 2x+20x+10=120

i.e. 22x = 110

x = 5 (kilometer hours).

Then B's velocity is: 5+1=6 (km/h).

Solution: The car set up drove for a total of x hours.

x=25/60+(360-25/60*72)/(72+48)+100/(72+48)

Solution x = 4 hours.

A: The car drove for a total of 4 hours.

The car traveled for a total of x hours.

x=25/60+(360-25/60*72)/(72+48)+100/(72+48)

x = 4 hours.

On a calendar, the sum of three adjacent numbers on a vertical column is 30, and if the middle number is x, then the other two numbers can be expressed as --- equation --- according to the title

Hello Hani, Hello:

Directly let the distance between the two villages of A and B be x kilometers, then the time used by Xiaohong is x 4, and the time used by Xiaolin is x 5+, and the time is equal, so there is x 4 = x 5 + 1 + 1 4, and the solution is x = 25, answer: The distance between the two villages of A and B is 25 kilometers.

Set the distance between the two places is xkm

Because the two people set off at the same time and arrive at the same time, the total time taken is equal, and the equation is:

x 4 = solution x = 25km

Let the distance between the two villages be x

As the time taken is the same.

x=15

The purchase price is set to be x, x(1+80%)=360x=200

It can be reduced by up to 120 yuan.

Let the purchase price be x, then, x=200, that is, the purchase price is 200 yuan.

The minimum selling price is 240 yuan, and the store owner can reduce the price by up to 120 yuan.

It's easier to solve this problem directly, but let's just list the equations

Set down x yuan, the same amount is the original price.

360 (1+80%)=(360-x) (1+20%), which gives x=120