What's the answer to the rule of primary school mathematics on page 46 of Jiangsu Education Press? How to write it? I haven't thought of it for half a century. One head is bigger than two. I feel dizzy

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1. 4 14 64
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7. 1. If 2x-y = 0 and X-5 > y, then the value range of X and Y is X=____ ,y=____ . 2. The equation (M + 2) X-2 = 1-m (4-x) has (1) positive solutions and (2) no more than 2 solutions
8. Ask some questions about sixth grade math 1. The quotient of number a divided by number B is 0.75, number A: number b = (): () 2. With a scale of 20:1, draw a 4 mm watch part on the drawing. The length of the part on the drawing is () 3. The number of safflower is 1 / 4 more than that of safflower, safflower: yellow flower = (): (), yellow flower is less than that of safflower ()
9. 1. Party A and Party B cooperate to complete a batch of work. At the end of the work, Party A completes four fifths of that of Party B. Party A will be paid according to the amount of work completed. If Party A gets 480 yuan, how much should Party B get? 2. Two thirds of the number a is equal to one fourth of the number B. given that the number a is 15 less than the number B, find the number a? 3. Team a, B and C jointly built a canal. Team a built 30% of the total length, team B built 70 meters more than team a, and team C built 210 meters. How long is the canal? 4. Party A and Party B set out from a and B to go towards each other. When they met, Party A's car traveled 4% less than 8 kilometers of the whole journey, and Party B's car traveled more than 40% more than 32 kilometers of the whole journey. How many kilometers are there between a and B? I want formula ~ formula... I don't want equation
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11. A factory completed 75% of the plan in the first half of the month and half of the plan in the second half of the month, increasing production this month () A 25% B 45% C 30% D 20% There are five teachers in the grade. When there are () students, the two schemes cost the same amount of money. When there are () students, choose scheme 1 to save money. When there are () students, choose scheme 2 to save money
12. There are four numbers, and any three of them add up to get 20, 27, 24 and 22 respectively. What are the four numbers
13. There are four numbers, three of which are added each time, and the sum is 22, 24, 27 and 20 respectively? The sum of two numbers is 6820. One of the addends has zero bits and ten bits are not zero. The other has zero bits and ten bits. If you remove zero, the two addends are the same. What are the two numbers?
14. Greek mathematician Diophantine interesting topic: now there are four numbers, take every three of them to add, then the sum is 22, 24, 27 and 20 respectively, find out how many of these four numbers are______ ．
15. There are four numbers, from which three numbers are taken at a time and added together to get four sums, which are 22, 24, 27 and 20 respectively
16. Now there are four numbers. Take any three of them and add them together. The sum is 22, 24, 27 and 20 respectively. What are the four numbers?
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19. Please help me to calculate the proportion of numbers What's our total RMB 28159 I contributed 18859 RMB, the second was 4000 RMB, and the third was 1800 RMB I would like to ask how many shares we have to be accurate! Subtracting 3500 yuan from the total amount, the total amount is 24659 yuan
20. Mathematical number operation F2D14517710804006263646566676869 2748D4021A1FFF078069000000000000 F2624617C10804006263646566676869 27B7D3021AB1FF078069000000000000 12D04517900804006263646566676869 0749D4021A3EFF078069000000000000 The first line of each group is unchangeable, and the second line is calculated according to the first line, The above three lines are all obtained by the same operation,