Textbooks

After check of textbooks found that every 8-th textbook should be withdrawn. Together 74 textbooks were withdrawn.

How many textbooks were in stock before withdrawn and how many after withdrawn?

Result

before:  592
after:  518

Solution:








Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):

Showing 0 comments:
1st comment
Be the first to comment!
avatar




To solve this example are needed these knowledge from mathematics:

Do you have a linear equation or system of equations and looking for its solution? Or do you have quadratic equation?

Next similar examples:

  1. Diophantus
    diofantos_1 We know little about this Greek mathematician from Alexandria, except that he lived around 3rd century A.D. Thanks to an admirer of his, who described his life by means of an algebraic riddle, we know at least something about his life. Diophantus's youth l
  2. Forestry workers
    forestry_workers In the forest is employed 63 laborers planting trees in nurseries. For 11 hour work day would end job in 43 days. After 14 days, 22 laborers go forth. How many days is needed to complete a planting trees in nurseries by others, if they will work 15 hours
  3. Motion
    cyclist_1 If you go at speed 6.1 km/h, you come to the station 51 minutes after leaving train. If you go by bike to the station at speed 17 km/h, you come to the station 43 minutes before its departure. How far is the train station?
  4. Logic
    blue-barrel A man drinks a barrel of water for 31 days, woman for 58 days, for how many days they drink barrel together?
  5. Bonus
    moeny Gross wage was 826 USD including 31% bonus. How many USD were bonuses?
  6. Chicks
    kuriatko How many chicks were hatched from 4500 eggs, when an average of 100 eggs hatched 87 chicks?
  7. Store
    pave One meter of the textile were discounted by 2.4 USD. Now 6 m of textile cost as before 3 m. Calculate the old and new price of 1 m of the textile.
  8. Motion problem
    dragway From Bratislavy to Brna go car at speed 88 km/h. From Brna to Bratislavy go another car at speed 53 km/h. How many minutes before the meeting will be cars 15 km away?
  9. Chocolate
    cokolada Charlie bought 7 same chocolates for 14 Eur. How many euros he pay for 27 chocolates?
  10. Cargo load
    truck_5 How many products weighing 12.5 kg can be loaded on a cargo car with a load of 1.5 t to load two-thirds?
  11. Cyclist
    cyclist_2 A cyclist passes 88 km in 4 hours. How many kilometers he pass in 8 hours?
  12. Notebooks
    Notebook_1 Liza a store owner buys 560 notebooks. He sold 3/8 of the notebook then she adds the stocks of notebook of 1/4 of the number of notebooks she bought. What is the total number of notebook she bought?
  13. Brick
    brick One brick is 2 kg and half a brick heavy. What is the weight of one brick?
  14. Root
    root_quadrat The root of the equation ? is: ?
  15. Brackets 2
    brackets Add parenthesis to make true: 5-2×6-4+2=5