5x + 2 = 2x + 14 solution 5x + 2 = 2x + 14 solution

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• 1. Equation 1 / 5 + 4x = 4 / 5 x-2x = 2 / 9
• 2. If we know that the | m | - 1 power of (m-2) times x = 1, we can solve the linear equation of one variable
• 3. Use equation or formula There are 240 bags of flour in the warehouses A and B. If b brings 50 bags to a, then the number of flour bags in B is 3 / 5 of that in A. how many bags of flour are there in the warehouses A and B?
• 4. It's OK to use equation or ordinary formula Car a runs 60 kilometers per hour, car B runs 36 kilometers per hour, car a and car B meet from the center of a and B, so car B starts a few minutes earlier than car a? There is no distance,
• 5. A and B set out from a and B at the same time, facing each other. After meeting, a continued to move forward and arrived at B for 18 minutes. B continued to move forward and arrived at a for 8 minutes. How many minutes did they meet after starting?
• 6. Mathematical problems, online, etc. thank you. You can solve them by equations, at least by formulas Fill in the blanks: The denominator of 5 out of 18 is reduced by 6. To keep the size of the fraction unchanged, the numerator should be () Mathematics application questions: 1. Cut and fill a parallelogram into a square. The perimeter of the square is 40cm. What is the area of the original parallelogram? 2. In the timber market, a batch of logs are piled up into a trapezoidal log pile. There are 5 logs at the top layer, and there are 10 more logs at the next layer than at the previous layer. How many logs are there in this pile? 2. A batch of logs are piled up in the timber market
• 7. A and B planes take off from the same airport and fly in the same direction. The speed of a and B is 300km and 340km per hour respectively. After flying for four hours, a plane speeds up and overtakes B in two hours. What's the speed of a plane after speeding up? One more question Two athletes practice running on the track around the lake. A is 250 meters per minute, B is 200 meters. They start from the same place and direction at the same time. After 45 minutes, a catches up with B. how long is the track around the lake?
• 8. It's forbidden to use arithmetic. It's required to write out the solution and the answer 1. Students went to Beihai Park to row a boat. It cost 565 yuan to rent 32 big boats and 32 small boats. It is known that the rental price of each big boat is 20 yuan, and that of each small boat is 15 yuan. How many big boats and small boats did you rent? 2. Students go boating in Beihai Park. The rental price of each big boat is 20 yuan, and that of each small boat is 15 yuan, which costs 360 yuan. It is known that the number of big boats rented by students is 1.5 times of that of small boats. How many big boats and small boats did you rent? 3. Students go boating in Beihai Park. The rental price of each big boat is 20 yuan, and that of each small boat is 15 yuan. It costs 680 yuan in total. It is known that the number of big boats rented by students is 1.5 times that of small boats. How many big boats and small boats did you rent? 4. Students go boating in Beihai Park. The rental price of each big boat is 20 yuan, and that of each small boat is 15 yuan. The number of big boats rented by students is 1.5 times that of small boats. It is known that the cost of renting big boats is 180 yuan more than that of renting small boats. How many big boats and small boats have you rented?
• 9. The multiplier is 10, the product is 630 more than the multiplicand, the multiplicand is______ ．
• 10. A math problem, do not have two unknown equations, to sixth grade pupils to accept the method, by the way, explain, hard you! In order to save resources and protect the environment, a city's Electric Power Bureau has been replacing Gufeng meters for residents for free since January this year, and then stipulates that: from 8:00 to 21:00 every day, 0.80 yuan per kilowatt hour ("peak electricity" price); from 21:00 to 8:00 the next day, 0.55 yuan per kilowatt hour (valley electricity price). At present, residents who do not use Gufeng meters charge 0.75 yuan per kilowatt hour, In March, we paid 91.5 yuan for electricity. After calculation, we can save 6 yuan by using peak valley electricity meter. 1. How many kilowatt hours does the small owner use in March? 2. How many kilowatt hours did the "peak electricity" and "valley electricity" use in March? We can't find it online, so please help us. It's hard to get the answer before 11 o'clock
• 11. (1) X: 2 / 5 = 5 / 6:4 (2) 5 / 7 * x = 1 / 3 △ 3 / 4 how to find an unknown number (* stands for multiplication) It's a process
• 12. It is known that ax4 (power 4) + BX3 (power 3) + CX2 (power 2) + DX + e = (X-2) 4 (power 4) Evaluation: (1) a + B + C + D + e （2）a+c
• 13. What's the cube of 1 + 2 + 10? What's the cube of 1-10?
• 14. Everyone loves holidays because people don’t need to go to school or work during the holidays.(A) All the holidays mean no school and no work .(B) go,during you out with a holiday friends; during another holiday,you stay at home to eat,talk,and have fun with your family.For example in the US, Everyone thinks New Year's Eve and new year are both for having parties with friends.Christmas Is the time to stay home and exchange gifts with family members.But the things are(c)___________ in Japan.For example,in Japan,New Year is for spending time with the family eating,talking,having fun,and going to the temples.But Christmas is for boy and girl friends to go out and exchange gifts. Of course, if you want to know these different holiday customs, you will learn about different histories and cultures Read the passage and complete the following characters 1、 According to the underlined sentence at (a), change the sentence pattern of the next sentence All the holidays mean _____ school _____ work. 2、 Join the underlined sentences at (b) into sentences .__________________________________________________________________________ 3、 Find a word in the passage and fill in the space at (c) to make the context coherent ___________________________________________________________________________ 4、 According to the passage, answer the following questions 1.Why do people like holidays? 2.In which country do people go out and exchange gifts at Christmas.
• 15. 1. What are the main customs of the "Dragon Boat Festival" in the author's memory? Why is it that "nearly half a century has passed" and that "all kinds of scenes are still clear in memory, never fade, never lose shape"? 2. What is the special impression of the Dragon Boat Festival on the author? 3. The second paragraph introduces the works of art with the theme of "making dragon boat". What do you think is the use of introducing these works? 4. Dragon Boat Festival in addition to dragon boat race, what other customs? Please list three The article has been transferred to my blog website as follows:
• 16. Given that the equations 4x + 5Y = 5; ax + 4Y = - 1 and 3x + y = 9; 3ax + 4BY = 18 have the same solution, find the value of a + B
• 17. In the system of equations 2x + y = 1 − MX + 2Y = 2 about X and y, if x and y satisfy x + Y > 0, then the value range of M is () A. m＜3B. m＞3C. m≥3D. m≤3
• 18. Find the unknown x.9x-3.2x = 8.12 4 / 15: x = 1.36:17
• 19. Find the unknown x 9 × 3 - seventeen tenths x = 13.4
• 20. 16﹙x+y﹚²-25﹙x-y﹚²