Number unknown

Adela thought the two-digit number, she added it to its ten times and got 407. What number does she think?

Result

a =  37

Solution:


a+10a = 407

11a = 407

a = 37

Calculated by our simple equation calculator.







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. Number
    num Determine unknown number if you know that difference between five times and triple of number is 36.
  2. Unknown number xyz
    numbs_1 Find the number that its triple is 24. Solve by equation.
  3. Addition of Roman numbers
    roman Added together and write as decimal number: LXXXVIII + DLXXXVIII
  4. What is missing (1000)
    red_minus What number is to add to get 1000?
  5. Primes 2
    prime_table Which prime numbers is number 2007 divisible?
  6. To thousands
    thousand_money Round to thousands following numbers:
  7. Textbooks
    textbooks After check of textbooks found that every 8-th textbook should be withdrawn. Together 74 textbooks were withdrawn. How many textbooks were in stock before withdrawn and how many after withdrawn?
  8. Roman numerals
    roman_1 Write numbers written in Roman numerals as decimal.
  9. Summand
    plus One of the summands is 153. The second is 26 more. Determine the sum of the summands.
  10. Farm
    krava_2 Agricultural cooperative (farm) produced 9779 liters of milk for 11 days. Which exceeded the plan by 1287 liters. How many liters of milk a day had planned to produce?
  11. Product
    complex-colors Result of the product of the numbers 5, 1, 7, 2, 6, 1, 0, 6, 6, 5, 1, 9, 6 is:
  12. Chestnuts
    gastany Antonio has 4-times chestnuts less than Floyd. Together they have 290 chestnuts. How many chestnuts has Antonio and Floyd?
  13. Eq1
    eq1_3 Solve equation: 4(a-3)=3(2a-5)
  14. If-then equation
    triangles_10 If 5x - 17 = -x + 7, then x =
  15. Popsicles
    nanuky Kurt went to buy ice lollies. If he buy 5 popsicles he missed 5 USD. When he buy 4 popsicles, got back 2 USD. How many USD was a popsicle?
  16. Benches
    garden_13 The park has 64 benches. Occupied are by 18 more than empty. How many benches are occupied and empty ?
  17. Orchard
    orchard 5 trees in 3 lines grows in the orchard. How many trees are in the orchard?