A quiz question in the first year of mathematics, find an answer。。。。。 Hurry, hurry

Solution: There are x number of business people attending the open-air café party. Then 1 2x (two people at a table) + 1 3x (three people at a table) + 1 4x (four people at a table) + x (one person with a bottle of Coke) = 50 Solution: x = 24 Answer: ......I guess that's how it should be).

Let's say x people participate.

1. A table for two people, x 2 juice bottles.

2. A table for 3 people, x 3 wine bottles.

3. A table for 4 people, x 4 bottles of mineral water.

4. One bottle of Coke per person, x bottles of Coke.

x/2+x/3+x/4+x = 50

x = 24

Let a total of x people column: x+x 2+x 3+x 4=50 and the solution is x=24

A group of business people gathered at the open-air café, where they first set a table for two, and the waiter brought a bottle of juice to each table. Later, they changed to a table of three, and the waiter brought a bottle of wine to each table. Soon they were seated at a table of four, and the waiter gave each table a bottle of mineral water.

In addition, they each asked for a bottle of Coke. At the end of the meeting, the waiter packed 50 empty bottles. If no one takes the bottle, how many people attend the party?

24 people.

Kilogram; 1950000000 400=4875000 cubic meters;

2. The dry classroom in your class pretends to be 13 meters long, 5 meters wide, and 4 meters high, that is, the volume is 260 cubic meters, and you need 18,750 classrooms.

1) 100 million = 1950000000 (kg).

1950000000 400=4875000 cubic meters;

2) I don't know how much the classroom in our class has been rousing the Lucky Pie.

The mass of the morning trip of the day's garbage kg).

Volume cubic meters) land round stool.

Solution: Treat the document printing work as a unit of 1, Xiao Li independently completes 1 6 per hour, and Xiao Wang completes 1 8 per hour

Then it takes 1 (1 6+1 8)=24 7 (hours)Answer: If they both do it together, it takes 24 7 hours to complete.

Have fun.

If a file is 1, then Xiao Li's speed is 1 6, and Xiao Wang's is 1 8

If it takes x hours for them to do it together, then there is (1 6 + 1 8) * x = 1 x = 24 7

1 (one-sixth plus one-eighth) = 24-7 hours.

7 hours.

1 2 Xiao Li efficiency * 1 2 workload + 1 2 Xiao Wang efficiency * 1 2 workload = 7 hours.

1 (1 6 + 1 8) = hours.

A: If the two of them do it together, it will take hours.

1。Because 201(a+3) +7|c|=0 where the addition of the two collapses is greater than equal, so a=-3 and c=0

2。It is obtained that b+1=3, i.e., b=2

Therefore, the polynomial of the fiber circle is simplified as.

6a -3ab + 6b mill locust -6a +2ab-6b -0-ab = -6

From the first condition, c = 0, and a is an arbitrary value.

From 2 to get b = 2

So the original = 0

Suppose there are x students in total, and there are x + 2 people with teachers, and the price is y (this is useless, you can do it or not, you need it to understand better).

The fee of travel agency A is: (x+1)*75%*y+y, and the fee of travel agency B is: (x+2)*80%*y

1) According to the problem, the inequality can be listed as: (x+1)*75%*y+y<(x+2)*80%*y

x>3When the number of students exceeds 3, travel company A has a discount over travel company B.

2) According to the question, you can get: (x+1)*75%*y+y=(x+2)*80%*y*(31 32).

Simplified, obtainable.

i.e. x 8, so it's 8 students.

I've been doing this kind of topic in the first year of junior high school, so I sympathize with you!

1 If the list price is A and the number of students is X, then A will be charged and B will be charged.

Let a+"Solve x=3

2 = 31 32 solution x = 8 total number of people 10

Solution: Suppose there are x students in total, and there are a total of x+2 people with teachers, and the price is AA: (x+1)*75%*A+A

B: (x+2)*80%*a

Yes: (x+1)*75%*a+a<(x+2)*80%*aWhen solving x>3, A is better than B.

2) Yes: (x+1)*75%*y+y=(x+2)*80%*y*(31 32).

x＝8