1. Solve the following equation:

x+3x = 16 4+5x = 3x+5 2(x+4)= 18

2. Table representation:

1. a number 5 greater than a 2 .. a number 7 less than half of b.

3. One third of x minus the difference of y 4. A number greater than five times n.

3. Solve application problems with equations:

1. The circumference of the circular runway is 400 meters. How many times can you run along the track, and you can run 3000 meters?

2. 0.3 yuan for Class A pencils and 0.6 yuan for Class B pencils. These two kinds of pencils were bought with 9 yuan money. How many pencils did you buy?

3. Plant a batch of trees. If everyone plants 10 trees, there are still 6 trees left. If everyone plants 12 trees, six trees will be missing. Ask; How many people plant trees/

4. The washing machine factory plans to produce 25,500 washing machines this year, among which the quantity ratio of three types of washing machines, A, B and C, is 1:2: 14. How many sets of these three types of washing machines are planned to be produced?

5. Enclose a rectangle with a 60-meter-long rope, so that its length is 0.5 times of 65438+ width. What should its length and width be?

6. Table of two charging methods for mobile phones:

Gotone easyown

The monthly rent is 50 yuan/month 0.

Local call charge 0.4 yuan/min 0.6 yuan/min.

① According to the two charging methods, how much do you have to pay for 200 minutes and 300 minutes of local calls a month?

(2) For a local call time, will the two charging methods have the same cost?

Teacher Zhang wants to get a phone card. Please give him some advice.

7. Teacher Wang took advantage of the summer vacation to lead members to the countryside for social investigation. The original price of each bus ticket is 50 yuan. Owner A said, "Drive my car and get a 20% discount." Car owner B said, "Take my car, students will get a 10% discount, and teachers won't buy tickets." Q: How many students does Mr. Wang take? Do you charge the same for two cars? And discuss the number of students, which car owner is more favorable.

Homework:

1. Solve equation:

7x+2 = 4x+ 1 1 4(8+3x)= 3x+4 1

Xiao Zhang is 6 years old and Grandpa is 72 years old. A few years later, Xiao Zhang is a quarter of his grandfather's age.