1. Can you fill it out quickly and accurately?
1, known as the solution of the binary linear equation x-ay= 1, then a=.
2. For the binary linear equation 3x+2y=8, when x=3, y=.
3. Write a set of positive integer solutions of the binary linear equation 2x-y=4.
4. Given the equation 3x+2y=5, if y is expressed by an algebraic expression containing x, then y=.
5. The number of people in Group B is half of that in Group A. If one third of the number of people in Group B is transferred to Group A, and the number of people in Group A is more than that in Group B 15 ... Let there be X people in Group A and Y people in Group B, then the equations can be obtained as follows.
Second, you can definitely choose the right one!
6, in the following equation, belongs to the binary linear equation for ().
A, B,
C, D,
7, solving equations is ()
A, B,
C, D,
8. If the coefficient x in the equation becomes an integer, then the following result is correct ().
a 、-x+y= 1 B 、-x+y=2 C、x-2y=2 D、x-2y=-2
9. If the equation mx-2y=3x+4 is a binary linear equation, then m satisfies ().
a、m≠0 B、m≠-2 C、m≠3 D、m≠4
10, the cost of a microwave oven is one yuan, and the selling price is 22% more than the cost price. If the inventory is sold at 60% of the sales price, the actual sales of each microwave oven is () yuan.
a、a( 1+22%)B、a( 1+22%)60%
c、a( 1+22%)D、a( 1+22%+60%)
Third, you can calculate and solve the following equation. Do not make mistakes! !
1 1、 12、
Fourth, think about it, you must be a wise man in life!
Class 1 (6) 13 held a philatelic exhibition, showing 32 more stamps than the average of 3 per person, but less than the average of 4 per person 15. Please find out the number of students in this class and the number of stamps on display.
14, Xiaoming went to buy sporting goods for the school. Every football 100 yuan, every basketball 60 yuan. * * * bought 20 balls, 1680 yuan. Can you find out how many football and basketball you bought?
15, there is a batch of vegetables to be transported to a wholesale market, and vegetable farmers are going to rent two kinds of trucks from car companies. It is understood that the records of renting these two trucks in the past two times are shown in the following table.
Total volume of Class A trucks (vehicles) and Class B trucks (vehicles) (tons)
1 4 5 28.5
The second time 3 6 27
This batch of vegetables needs to be transported by renting five A-type trucks and two B-type trucks at one time. If you pay 20 yuan freight per ton, how much will the vegetable farmers pay?
16, A and B go in opposite directions from A and B, which are 9 1 km apart, and meet after 10 hour. If A leaves 4 hours and 20 minutes earlier than B, then B will meet after 8 hours and find the speed of A and B..
17, the express train is 306 meters long and the local train is 344 meters long? It takes 13 seconds for two cars to walk in opposite directions. If two cars are driving in the same direction, it takes 65 seconds for the express train to catch up with the local train and leave the local train? What are the speeds of the express train and the local train?
18, Xiaoying's home is1880m away from school, one is uphill and the other is downhill. It took her 16 minutes to run to school. It is known that Xiaoying's average speed on the uphill road is 4.8 km/h, while her average speed on the downhill road is12 km/h. How long does it take Xiaoying to go uphill and downhill?