If 2A + 3B = 4 and 3a-b = - 5 can hold simultaneously, then a = B=

RELATED INFORMATIONS

• 1. Let 3A = 2, 3b = 5, let a and B denote the root of log (3) 30 Let 3A = 2, 3b = 5, try a and B to represent log3 √ 30
• 2. 30. Given a ^ 2 / 3 + B ^ 2 / 3 = 4, x = a + 3A ^ 1 / 3B ^ 2 / 3, y = B + 3A ^ 2 / 3B ^ 1 / 3, find (x + y) ^ 2 / 3 + (X-Y) ^ 2 / 3
• 3. If a three digit ABC satisfies ABC = a ^ 3 + B ^ 3 + C ^ 3, such as 153 = 1 ^ 3 + 5 ^ 3 + 3 ^ 3, it is called "wonderful number", and the sum of all numbers satisfying the condition is obtained
• 4. ABC three integers, satisfy a + B + C = 2001, and 1 Sum to get three numbers, and the original three numbers, a total of six.
• 5. . integer 1
• 6. Among the nine integers from 1 to 9, ABC [A is not equal to B, not equal to C] indicates what number can make the equation hold C divided by B = a divided by 1 = B divided by a
• 7. Judge the position relation of the following points and give the proof. (1) a (1,2) B (- 3, - 4), C (2,3.5) (2) P (- 1,2) Q (0.5,0) r (5, - 6)
• 8. As shown in the figure, points a, B and C are on the same straight line, ∠ 1 = ∠ 2, ∠ 3 = ∠ D. try to judge the position relationship between BD and CF, and explain the reason
• 9. (1 / 2) the first question is to judge the position relation of a (- 2,12), B (1,3), C (4, - 6) and explain the reason (1 / 2) question 1 judge the position relation of a (- 2,12), B (1,3), C (4, - 6) and explain the reason The second problem is to find the three dimensions of the line 2x-5y-10 = 0 and the coordinate axis
• 10. Given three points a (1,3), B (- 2,0), C (12,4), try to judge whether these three points are on the same straight line, and explain the reason
• 11. When a = 0.6, B = 0.2, find the value of 2.5 (3a + 3b-0.4)
• 12. Simplification: 5 (3a-b) - 4 (- A + 3b)
• 13. If A-B = 5, then 3A + 7 + 5b-6 (a + 13b)=______ ．
• 14. How to get 3A + 5 = 3B + 5 from a = B?
• 15. Try to explain how to get 3a-2 = 3b-2 from a = B
• 16. How to get 3A = 3B from a = b Give some books to the children (3) class. If everyone gives four books, there are two left. If everyone gives five books, there are five left. How many students are there in the class The second problem is best to solve the equation
• 17. When the mass of aluminum block is 50g, 882j heat is released and the temperature is reduced to 12 ℃, the original temperature? Specific heat capacity C = 0.88 * 10 ^ 3j / (kg ·℃) Do you have to set X? Is it OK not to set it up
• 18. If the maximum pressure that the brick can bear is 882000pa, how high can the brick with a density of 1800kg / m3 build a wall at most?
• 19. A physics problem about speed calculation When an earthquake occurs, the vibration of the source propagates outward in the form of S-wave and P-wave. The propagation speed of the two waves in the crust is not the same, about 3.4 km / s and 5.6 km / s respectively. The place directly above the source becomes the epicenter. The first one to reach the ground is the P-wave. At this time, people in the epicenter will feel up and down turbulence, and then the S-wave will come, and they will feel left and right sway, If the time difference between P-wave and S-wave arriving at the epicenter is 2 seconds, how many kilometers is the distance from the source to the epicenter?
• 20. For a car with a mass of 2T, when driving on a straight road, the resistance is always 0.2 times of the gravity. After driving at a constant speed for 2km, the engine is turned off, and then it stops after driving for 55m. It is necessary to explain the work (g = 10N / kg) of the traction force on the car in the whole process