When a, B and C go shopping together, 1 / 2 of a's spending is equal to 1 / 3 of B's spending, and 3 / 4 of B's spending is equal to 3 / 5 of C's spending Spend 98 yuan more than a, ask them how much money they spend in total? Not three yuan equation, we primary school students, ask for help

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• 1. () 3 / 8 equals 0.75
• 2. Party A and Party B process parts. Party A processes nine parts in ten minutes and Party B processes fourteen parts in fifteen minutes?
• 3. The two warehouses store 120 tons of grain each, and transport 30 tons of grain from warehouse B to warehouse A. at this time, the grain in warehouse B is ()
• 4. Point P (a, b) is on the straight line x + y + 1 = 0, find the minimum value of A2 + B2 − 2A − 2B + 2
• 5. Point P (a, b) is on the straight line x + y + 1 = 0, find the minimum value of A2 + B2 − 2A − 2B + 2
• 6. Point P (a, b) is on the straight line x + y + 1 = 0, find the minimum value of A2 + B2 − 2A − 2B + 2
• 7. A + B + C = 0 prove A3 + B3 + C3 = 3ABC, A3 + A2C + B2C = ABC
• 8. How to change A3 + B3 + C3 ≥ 3ABC into a + B + C ≥ 3 times of the root ABC? Like the title,
• 9. Triangle ABC is a triangle if its three sides satisfy C3 = A3 + B3
• 10. ABC is the three sides of a triangle. If A3 + B3 = C3, then it is a triangle
• 11. A total of 13 boys and girls went to the park to plant trees. Each boy planted 6 trees, and each girl planted 4 trees. A total of 64 trees were planted. How many boys and girls were there? You can't use equations! Help!
• 12. The awareness of the school chorus is more than three times that of the dance team There were () students in the chorus Only the chorus!
• 13. There are 60 male workers in the first workshop. Male workers are one third of female workers. How many female workers are there?
• 14. A batch of saplings were transported to afforest the campus. 82 saplings were transported for the first time and 78 saplings were transported for the second time. Four fifths of the total saplings were transported for the second time. How many saplings are there in total
• 15. The goods can be transported 6 / 5 in 6 days by ab. if the goods are transported alone, it takes the same time for a to transport 3 / 1 and B to transport 2 / 1
• 16. A plane flies between two cities, The wind speed is 24 km / h, it takes 2 hours and 50 minutes to follow the wind. It takes 3 hours to fly against the wind. To find the distance between the two cities and the speed of the aircraft itself, we need to use the one member first-order equation!
• 17. A and B leave each other from two places 360 km away. It is known that the speed of a is 60 km / h and that of B is 40 km / h. If a leaves for one hour first, how long will it take for B to meet each other?
• 18. The question of mean inequality X + y + Z = Pi, find the maximum value of SiNx + siny + Sinz The sum difference product is (3 / 2) * radical 2, but if we use the mean inequality, SiNx + siny + Sinz > = 3 (sinxsinysinz) ^ (1 / 3). When x = y = z = pi / 3, we take equality, and the minimum value is (3 / 2) * radical 2. What's the matter? 0
• 19. Let a, B and C be positive real numbers, and prove that 12a + 12b + 12C ≥ 1b + C + 1C + A + 1A + B
• 20. The mean inequality problem, It is known that ABCD > A ^ 2 + B ^ 2 + C ^ 2 + D ^ 2, ABCD is a real number