1: 8 times of a number multiplied by 10 equals 10 times of this number minus 8, and find this number.

Solution: let this number be X.

8x+ 10= 10x-8

10x-8x= 10+8

x= 18÷2

x=9

2. The average of two numbers is 24.6, in which the number A is twice that of the number B. What is the number B?

Solution: let b be x, then a is 2x.

x+2x=24.6×2

x = 49.2 \3

x= 16.4

3. Mom bought three bags of milk, 1 bottle of drinks, and spent 10.35 yuan. The price of a bottle of beverage is 0.5 times that of 65438+ a bag of milk. What are the prices of drinks and milk?

Solution: If each bag of milk is X yuan, then each bag of drinks is 1.5x yuan.

3x+ 1.5x= 10.35

x= 10.35÷4.5

x=2.3

Beverage: 2.3× 1.5=3.45 yuan.