The ratio of 72 to 24 is equal to the ratio of 15 to X. list and calculate the ratio, and solve the ratio

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• 1. In a ratio, the ratio of the two ratios is equal to 5, and the two internal terms of the ratio are 1.5 and 1.2 respectively, then the ratio is ()
• 2. In a ratio, the ratio of the two ratios is equal to 8, and the two inner terms are 5 and 12 respectively. This ratio is () or () The car can reach the destination in 7 hours at the speed of 60 kilometers per hour, and it can reach the destination in 5 hours at the speed of () kilometers per hour (1) The distance of the car is () (2) The product of two times () and () is certain, that is to say () and () are in inverse proportion 3 / 2: 3 = 2 / 3: n (m, n are not 0), then M: n = () 3 / 2: M = 2 / 3: n (M and N are not 0), then M: n = ().
• 3. Two times three equals six
• 4. First simplify, then evaluate: (x + 2) (x + 3) + 3 (x-1) (x + 1) - (2x-1) (2x + 3), where x = - 2 Come on!
• 5. First simplify, then evaluate, (x-2-x + 5 / 2) / 2x * 4 x-3
• 6. 1 / 2 of a number is 25 less than 3 / 5 of it?
• 7. What is the negative 2 / 3 of (- 3 / 8)
• 8. What is 1 + 3 + 5 + 7 + 9?
• 9. What about 2001-1998 + 1995-1992.12-9 + 6-3?
• 10. 2001-1998+1995-1992+… +15-12+9-6+3．
• 11. Write the ratio of two ratios equal to 1.5 and make up the ratio
• 12. One in 20 of 30 is equal to one in 10
• 13. The ratio of 10 to 12 is equal to the ratio of 35x,
• 14. 1.25 parts x equals 0
• 15. The factor of 24 has () to choose four numbers to form a proportion. The ratio of the two numbers is equal to 3 / 4. The proportion formula is ()
• 16. 2X of 3 + X-1 of 1-6 = 1
• 17. The solution is 2x + 1 of 3 - x + 1 of 6 = 2
• 18. If three-quarters of x equals two-thirds of Y, then x: y = what
• 19. If x equals three fourths of Y, then what is y equal to than x
• 20. 9x-7 / y = 0 (x, y is not equal to 0), X and y are proportional to (), why?