Urgently looking for a one dimensional equation calculation problem, who has it?

1. 5x+5=25

2. 5r-6=6r-12

5. 2t+5=3t-5

6. 9u+2=10u-8

7. x+x+1+x+2=90

A class of students marched in a line from school to a farm to work, traveling at a speed of 4 kilometers per hour, and when they walked 1 kilometer, a student was ordered to go back to school to pick up something, he ran back to school at a speed of 5 kilometers per hour, took something and immediately chased the team from the same speed, and then caught up with the team at a distance of 1 kilometer from the farm, asking for the distance from the school to the farm?

Please use a one-dimensional equation to calculate the answer at once (and the standard answer is kilometers), and set the distance from the school to the farm x kilometers. (x=

Distance from school to farm in km.

A class of students buys a souvenir, each person out six points will be more than 4 corners and 8 points, if each person out 5 points will be less than 3 points, how many famous students do you want?

Solution: There are x students, and the equation 6x-48=5x+3 is obtained by doing the same amount of ** in the souvenir

6x-5x=3+48

x=51 A: There are 51 students. Thank you.

Although there are less than 70 questions, I hope it helps you, 3x+189 3=521 27(2x-1)-3(4x-1) 9=[4(3x+2)-1] 9(5y+1)+1-y)] 2= [(9y+1)+ 1-3y)] 320% 5+(1-20%)(320-x) 9=320 40% 32(x-2) 6+2 9=(x+1) 2

2(x-2)/2-3(4x-1)/3=9(1-x)/211x/2+(64-2x)/6=(100-9x)/815-(8-5x)/2=7x/3+(4-3x)/43(x-7)/4-2[9-4(2-x)]/9=22/33/2[2/3(1/4x-1)-2]-x/9=2/51/9+5/8x-(-1/8+5/2x)=641.（5x-1)/4=(3x+1)/2-（2-x)/32.(3x+2)/2-1=(2x-1)/4-(2x+1)/5

There are too many, just a few to solve.

2. It's not an equation.

4. No solution. 5. No solution.

You're too lazy, and you've got enough time to solve these problems!!

（1）3（x-2）=2-5(x-2)

2) 2(x+3)－5(1－x)=3(x－1)(3)

17) (x-3)=2- (x-3)

24） (3y+7)=2 - y

25) Let k be an integer, and the solution x of the equation kx=4-x is a natural number, and find the value of k.

I'm also going to be a tough question!! Ha ha.

Calculation questions x = 630x-10 (10-x) = 100

x=54(x+2)=5(x-2)

x=18120-4(x+5)=25

x=15x+863-65x=54

x=3(x-2)+1=x-(2x-1)

x=3/211x+64-2x=100-9x

x=2 application question 1, from the summer camp to the school, first down the mountain and then take the flat road, a student first got up the bicycle and went down the mountain at a speed of 12 kilometers per hour, passed the flat road at a speed of 9 kilometers per hour, and it took 55 minutes to get to school, when he came back, he passed the flat road at a speed of 8 kilometers per hour and went up the mountain at a speed of 4 kilometers per hour to return to the summer camp It took 1 hour and 30 minutes, how many kilometers from the summer camp to the school?

2. Train A is 120 meters long, the speed is 60 kilometers per hour, train B is 130 kilometers long, the two cars go in the same direction, when the head of train B catches up with the tail of train A, there are two trains leaving after 3 minutes. Finding train speed B?

3. There are two trains A and B, train A is 120 meters long, and train B is 130 meters long, and they are 60 kilometers per hour. At a speed of 65 km/h, how long does it take for the two cars to leave after moving in opposite directions?

4. A and B practice running on a circular track, A can run a lap in 50 seconds, start from the same place, run in reverse for 20 seconds, and find out how long it takes B to run a lap.

5. The homes of students A and B are 26 kilometers apart, and they make an appointment to travel to a place between their homes on Sundays. A takes a pet with him when he departs, and A and B set off at 7 km/h and B at 6 km/h at the same time from their respective homes. The dog was running back and forth between A and B at a speed of 20 kilometers per hour at the same time.

That is, after encountering B, immediately return and run to A. It was until the two met and asked how far the dog had run.

6. Xiao Ming has to rush to school 1000 meters away from home before 7:40 every morning. One day, Xiao Ming set off at a speed of 80 meters, and five minutes later, Xiao Ming's father found that he had forgotten to bring his language book, so his father immediately chased Xiao Ming at a speed of 120 meters and asked him when he would hand over the book to Xiao Ming.

If x=-1 is the solution of equation 2x-3a=7, then a=

Knowing that x is 3 times less than x and 2 times less than x6, the equation is listed as

The admission fee for a park** is stipulated in the following table:

Number of ticket purchasers: 1 50 people, 51 100 people, 100 people or more.

The ticket price is 5 yuan and 4 yuan.

A total of 103 people in class A and class B of a school (of which the number of class A is more than the number of class B) to visit the park, if the two classes are separately purchased by class, a total of 486 yuan will be paid

1) How much money can be saved if two classes are combined and buy tickets as a group?

2) How many students are in each class?

A three-digit number, the number in the hundred digit is 1 greater than the number in the tenth digit, and the number in the single digit is 3 times less than the number in the tenth digit.2 If the order of the three digits is reversed, the sum of the three digits obtained and the original three digits is 1171, find this three-digit number

x-1）- 3x+2）= - x-1）．

The rules of the football game are 3 points for a win, 1 point for a draw, and 0 points for a loss, if a team has played 14 games and lost 5 games, a total of 19 points are scored, then the team has won ( ).

a．3 b．4 c．5 d．6