An equation problem, math experts are coming!

Let's say the output in October is x

x+ solution gives x=50

The December output is.

Let's say the output for October is x

Because the production in November was 10% less than in October, ie.

1 - 10%)x =

It needs to be 20% more in December than in November, that is, in December.

So the output for these three months is:

x + = just guarantees that the production in Q4 is equal to the production in the third quarter.

So. = 149, the solution is x = 50

So the production in December is:

54 tons.

If the October production is x, then the November production is (1-10%) x, and the December production is 20% higher than that in November, and finally the fourth quarter can reach the third quarter production of 149 tons, that is, the equation is as follows:

x+(1-10%)x+ tons, calculated as x=50, tons, so the output in December was 54 tons.

Set October x

November is.

In December, it's x x

It all adds up to 149

The result was 54 tons in December.

If the output in October is x tons, then the output in November and December will be tons and tons respectively.

x+x=149÷(1+

A: The output in December was 54 tons.

Each person is allowed to carry a kilogram of luggage free of charge.

150-a）/（150-3a）＝8/4

a 30 kg.

Solution: Let each person bring x kg for free, and the equation is: (150-x) 8=(150-3x) 4

600-4x=1200-24x，20x=600，x=30.

A: Each person can carry 30 kg of luggage free of charge.

If each person can bring xkg for free, the excess will be charged 150-x=8k per yuan ykg, 150-3x=4k will be x=60 Thank you!

There are x number of parts.

Then: x 36=(x*2 5) 36+[x*(1-2 5)] [36*(1+40%)]20

That's the equation, just find x.

Thank you for your points.

This batch has a total of x parts, then x 36 days can be completed.

If the efficiency is increased by 40%, 36 (1+40%) pieces will be processed per day.

x/36)-20=(2x/5)/36+(3x/5)/[36(1+40%)]

It is easy to understand with arithmetic.

1.Speed is inversely proportional to time, assuming that the original speed at the time of departure is 1, and the speed after the accident is 7 10, the time taken for this journey is the original 10 7, and the time used for this journey is 10 7 = 3 7, and the actual time taken for this journey = 2 (3 7) = 14 3 (hours).

2.If you go another 21 kilometers from the original speed in the event of an accident, the corresponding time for the next leg of the journey is 1 (3 7) = 7 3 (hours), so the time taken for 21 kilometers = 14 3-7 3 = 7 3 (hours).

3.Original speed = 21 (7 3) = 9 (km/h) 4Camp distance of A and B = 9 * (4 + 14 3) = 78 (km) Equation: Solution: Let the distance velocity be 10x and the time is t10xt=40x+7x(t+2-4).

t=26/3

7x(t-2)=10x*21/10x+(t-3-21/10x)*7xx=9/10

So, the distance is 10*9 10*26 3=78 km, thank you.

Question 2: Solution: Set up to sell x copies of science and technology books.

5x-x=240

4x=240

x = 240 divided by 4

x=60 Question 1: Solution: Set the apprentice to process x pcs.

x+x=105 divide.

x=42 I don't understand the third question, the question seems to be wrong.

Question 4: Solution: The length of the East China Sea Bridge is x meters.

x+x+2x=2x=65

x = 65 divided by 2

x = Donghai Bridge: kilometers.

Hangzhou Bay Bridge: km.

1. 105/（

3.The question is unclear and cannot be answered.

1.Answer: 42. Solution: Divide 105 to get 42

2.Answer: 60. Solution: 240 divided by (5-1) to get 603You seem to have made a mistake. Answer: 130. Solution: 155 multiplied by 2-180 to get 130

4.If you don't have a building or make a mistake - answer: Donghai Bridge is meters long, Hangzhou Bay is long: meters If you do make a mistake - Answer: Donghai Bridge is 32,500 meters long, Hangzhou Bay is 36,000 meters long.

Yes, it's simple, but it's not easy to type. Let's do it! Thank you!

1.The apprentice processed a total of x and the master.

x+x=42

2.Sell x science and technology books, sell 5x literary books

5x-x=240

x=603.The original batch of apples had x boxes.

x+180)*1/2=155

x=1304.Hangzhou Bay Bridge x+ Donghai Bridge xm

x+x=Hangzhou Bay Bridge East China Sea University.

1.Set up apprentices to process x pcs. then, i.e., x=42

2.Set up x science and technology books. Then 5x-x=240, i.e. 60

3.The East Bay Bridge is x meters long, and the Hangzhou Bay Bridge is x + meters. Then x+x+ i.e. x=meter.

Very simple arithmetic, the eggs bought must be an integer, the number of eggs is 20, 3, the common multiple of 9 and can not be greater than 25, the number of goose eggs is the common multiple of 7.

Since the number of eggs is definitely an integer, and the unit price of eggs is 4 round, and the unit price of duck eggs is 3 yuan, no matter how many eggs and duck eggs are bought, there will be no change (0.0 yuan), so buying goose eggs is also the whole money, and the unit price of eggs is 4 yuan, and the unit price of duck eggs is 3 yuan. The total number of eggs and duck eggs to buy is 100-7x, the total price is 100-x yuan, from the unit price of chicken and duck eggs, it can be seen that no matter how to buy eggs and duck eggs, the average ** is not less than 3 yuan and not more than 4 yuan, namely: 3 (100-x) (100-7x) 4 get: 10 x So the money to buy goose eggs is 10 yuan or 11 yuan, but if you take 10 yuan, the average price of chicken and duck eggs is 3 yuan, you can't buy eggs, so you need to buy 11 round goose eggs if you want all kinds of eggs.

Next, let's do the math, set Y eggs, Duck Eggs Z.

y+z=100-7x=23

4y+3z=100-x=89

Solution: 20 eggs, 3 duck eggs, 77 goose eggs.

Solution: Let the eggs x, duck eggs y, goose eggs z, x, y, z are integers according to the meaning of the title

x+y+z=100

x is a multiple of 10 and less than or equal to 100 and greater than or equal to 10 (i.e. x is . . . 100）

Solution: x=60, y=24, z=16

The unit of egg is wool, and the unit of duck egg and goose egg is yuan? Are you sure you made a mistake?

1. Set the number of eggs, duck eggs, and goose eggs to be bought as x, y, z, and 2, and the simultaneous equation:

x+y+z=100

3, however, due to the lack of conditions for the problem, that is, there are 3 unknowns, but there are only two equations, and the specific value cannot be obtained, and the landlord may need to see if there are other conditions. Hope it helps!

Set eggs x duck eggs y goose eggs z

x+y+z=100

Covenant to go to one.

The x, y, z, and most of them are integers, so.

x can only go to 60 70 after more than that.

So x=60, z=14, y=26

Let eggs x duck eggs y goose eggs z and x+y+z are all positive integers. Linear programming for drawing. If the egg is 1 mao a.

Change x+2y+3z 100 to .I can't figure out if it's because you didn't finish your question. Why are the conditions insufficient?

Solution: Let the smaller number be x, then the larger number is x+1

x+x+1=145

2x=145-1

2x=144

x=72x+1=72+1=73

The smaller natural number is 72 and the larger natural number is 73

Solution: Let the smaller number be x and the larger number be x+1

then x+x+1=145

x = 72 and the other number is 73

Let the previous natural number be n, then there is n+(n+1)=145, and we can get n=74, which are 74 and 75.