The school made a batch of the same curtains, the first time it was 16, the second time it was 20 times faster, and the first time it used less 18 meter cloth than the second time. How many meters of cloth is used for each curtain?

Solution: Use X-meter cloth to insert each curtain.

20x- 16x= 18

4x= 18

x=4.5

2. The sales department of washing machine factory sold 15 washing machines in the morning and 18 washing machines in the afternoon, which was 2550 yuan less than that in the afternoon. How much is each washing machine? How much do you charge in the morning and afternoon?

Solution: Set X yuan for each washing machine.

18x- 15x=2550

3x=2550

x=850

Collect 850× 15= 12750 yuan in the morning.

Payment in the afternoon is 850× 18= 15300 yuan.

3. A clothing factory originally made a set of 4.8m school uniform cloth. After improving the cutting method, each set saves 0.3 meters of cloth. How many sets of cloth can you make now?

Solution: Suppose you can do X group now.

(4.8-0.3)x=4.8×3000

4.5x= 14400

x=3200

The sum of Xiao Ming's and his father's age is 49, and his father's age is three times that of Xiao Ming and five years older. How old are Xiaoming and Dad?

Solution: Let Xiao Ming be X years old.

x+3x+5=49

4x=44

x= 1 1

3x+5=38

Xiaoming 1 1 years old, and his father is 38 years old.

5. Yucai pupils go to the Children's Palace for activities. The number of people going in the morning is 200 more than that in the afternoon, and the number of people going in the morning is three times that in the afternoon. How many people went in the morning and afternoon?

Solution: Suppose there are X people in the afternoon.

3x-x=200

2x=200

x= 100

3x=300

300 people in the morning and 0/00 people in the afternoon.