Textbooks

After check of textbooks found that every 10-th textbook should be withdrawn. Together 58 textbooks were withdrawn.

How many textbooks were in stock before withdrawn and how many after withdrawn?

Result

before:  580
after:  522

Solution:

Solution in text before:=
Solution in text after:=







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. Bus driver
    bus_2 The bus driver rides 175 km in the morning, afternoon rides 20 km more. How many kilometers traveled in 5 days if he rides on the same line?
  3. Pension or fraud
    dochodca_icon Imagine that your entire working life working honestly and pay taxes and to Social Insurance (in Slovakia). You have a gross wage 1110 Euros, you pay social insurance (you and your employer) monthly € 333 during 42 years and your retirement is 522 Eur
  4. Chocolate
    cokolada_1 How many times should be broken chocolate consisting of 10 × 12 pieces to get the 120 parts?
  5. Chocolate
    cokolada Ivan bought 7 same chocolates for 28 Eur. How many euros he pay for 21 chocolates?
  6. Camp
    skauti In the camp are children. 1/2 went on a trip, 1/4 went to bathe and 58 children remained in the room. How many children are in camp?
  7. Count of roots
    eggs How many solutions has equation x. y = 7757 with two unknowns on the set of natural numbers?
  8. No. of divisors
    triangle_div How many different divisors has number ??
  9. Steps
    square_diagonal_1 How many steps you save if you go square estate for diagonal (crosswise), rather than circumvent on the two sides of its perimeter with 307 steps.
  10. Weeks
    calendar 33 weeks is equal to how many days?
  11. Shelf
    bookshelf.JPG How many ways are there to arrange 6 books on a shelf?
  12. Chocolates
    Chocolate In the market have 4 kinds of chocolates. How many ways can we buy 23 chocolates?
  13. Candy
    bulls How many ways can divide 16 identical candies to 4 children?
  14. Brick
    brick One brick is 6 kg and half a brick heavy. What is the weight of one brick?
  15. Divisibility
    dots Determine the smallest integer which divided 11 gives remainder 4 when divided 15 gives remainder 10 and when divided by 19 gives remainder 16.
  16. Numbers
    ten Determine the number of all positive integers less than 4183444 if each is divisible by 29, 7, 17. What is its sum?
  17. LCM
    calc_icon What is the least common multiple of 10, 30, 48?