3. The difference between a number minus 1 is equal to 1, and the number on the side is ().
4. The equation is solved.
3x+5 = 4x+ 1 9-3y = 5y+53x = 5x-4
5. If a car's fuel tank is full of oil, after using 1, add 15 liters, and the fuel tank is just full again. Q: How many liters of oil can the tank hold?
6。 It is known that the sum of three consecutive natural numbers is 165. Find these three natural numbers.
This is what I wanted to modify before: using the properties of equations to solve equations. And testing.
3 x- 1=7 5-3 1t=3 4t+8。
Workbook 1: 1. 1. Last year, the unit price of drugs was 12 yuan, and this year, the price of drugs was reduced by x%. On the other hand, the unit price of drugs this year is: (list the equations, not calculate)
2. The taxi fare standard in a place is: the starting price 10 yuan, and 2 yuan every kilometer after 3 kilometers. The matchmaker took a taxi for 5 kilometers, paid () yuan, and wanted to ride X (X > 3) kilometers, should pay () yuan.
3. A communication company lowered the hourly rate of mobile phones by one yuan per minute according to 0.6 yuan, and then lowered it again by 15%. At present, the charging standard is RMB () per minute, and the company has lowered 15% according to the 0.6 yuan per minute. After subtracting one yuan, the current charge is () yuan per minute.
4. The equation is solved.
X+2 1x+3 1x+5 = 126 500 x20 %- 10% X = 500 x 10%。
Pick me. Please.